Aquaponics Digest - Mon 06/04/01



Message   1: Bookmarks posted.             from dreadlox 'at' cwjamaica.com

Message   2: AQUAPONICS IN AFRICA
             from "Ray & Margi Gibbison" 

Message   3: Re: Help anyone!!
             from RalphMcl 'at' aol.com

Message   4: Re: Aeration
             from "Chris G" 

Message   5: Re: Aeration
             from "KenHale" 

Message   6: Remove from mailing list

.thank you
             from Jakobihu 'at' aol.com

Message   7: Remove from mailing list
             from "Todd Breunig" 

Message   8: 
             from "Randy Salars" 

Message   9: Basic list instructions
             from S & S Aqua Farm 

Message  10: Re: Help anyone!!
             from "STEVE SPRING" 

Message  11: Re: BASIL
             from "STEVE SPRING" 

Message  12: Re: Affordable feed sources
             from "STEVE SPRING" 

Message  13: Re: Affordable feed sources
             from "STEVE SPRING" 

Message  14: Re: Aeration
             from "Chris G" 

Message  15: Re: Aeration
             from "Arlos" 

Message  16: RE:  Temperature ranges
             from "Charlie Shultz" 

Message  17: Thanks go Out
             from "Charlie Shultz" 

Message  18: Re: Temperature ranges
             from LHaver1038 'at' aol.com

Message  19: RE:  Temperature ranges
             from fishmanbruce 'at' webtv.net (Bruce Schreiber)

Message  20: Re: Affordable feed sources
             from fishmanbruce 'at' webtv.net (Bruce Schreiber)

Message  21: Re: Giant earth worms
             from fishmanbruce 'at' webtv.net (Bruce Schreiber)

Message  22: Re: Africa
             from fishmanbruce 'at' webtv.net (Bruce Schreiber)

Message  23: Re: Fwd. fish sp for acuaponics HELP
             from fishmanbruce 'at' webtv.net (Bruce Schreiber)

Message  24: Re: Giant earth worms
             from "TGTX" 

Message  25: Re: Fwd. fish sp for acuaponics HELP
             from pablo obiaga 

| Message 1  

Subject: Bookmarks posted.From:    dreadlox 'at' cwjamaica.com
Date:    Mon, 04 Jun 2001 00:41:45 -0700

Here is the list as refined
.This can be expanded at a later time.    
Site of posting to be announced. Ada, did you want to post the bookmark
list on your site? I can provide a site and you can link to it??       

Aerators-Blowers
Alternative Animal Feeds
Alternative Cooling
Alternative Energy Sources
Alternative Farming
Alternative Health
Alternative Heating
Alternative Buildings - Sod Yurts
Alternative Technology
Aquaculture
Aquaculture Machinery
Aquaponic Parameters for Indigenous Species
Aquaponics
Aquaria-Ornamental Fish
Biodigestion
Biofilters
Chemical Search Engines
Composting
Cooking-Recipes
Crop specific information
Dictionaries
Ecotourism
Electrical Engineering/Repairs
Extension Services
Farming
Fish Resources
Flowers
Greenhouse Automation 
Greenhouse Structures
Groups or Associations
Grow Beds
Herbs
Herbs
Hydroponics
Large Equipment
Lighting
Marketing
Nutrients
Organic Certification regulations
Organics
Ozone Friendly
Packaging-Suppliers/Machines
Permaculture
Pest Management
Plastics-Liners/Greenhouse Coverings
Pond Stuff
Post-Harvest /Handling
Preserving
Publications
Pumps-Suppliers/Models
PVC Issues
Rain Water
Recipes
Rockwool
Schools-Aquaponic Curriculum and School Visit Info
Search Engines
Seed Sources-Seed Trays
Small Engines
Solar Equipment
Tissue Culture
Tubing
Universities
Waste Digestion
Water Purification
Water Quality

Mike,
JAMAICA.

| Message 2  

Subject: AQUAPONICS IN AFRICA
From:    "Ray & Margi Gibbison" 
Date:    Mon, 4 Jun 2001 08:03:19 +0200

----- Original Message -----
From: "Chris Mollison" 
To: 
Sent: Sunday, June 03, 2001 10:04 PM
Subject: Re: BASIL

> Tilapia fingerlings can be sourced from both Rhodes and Stellenbosch
Universities. I have contact names and numbers 

> Could you let me have them: maybe they can point me to a counterpart here
in Pretoria.

Good luck, Chris. Re telephone conversation: the pumps we use are called
Pedrollo and if you give Ray a ring at 011 329 6852 he can fill you in on
the specs and supplier in Cape Town. I have mailed Alexvw to get in contact
if he should wish to do so.

Best regards
Margi Gibbison

>
>
>
> ----- Original Message -----
> From: "Ray & Margi Gibbison" 
> To: "AQUAPONICS WEBSITE" 
> Sent: Friday, June 01, 2001 10:45 PM
> Subject: BASIL
>
>
> > Hi
> > Our  annual (December)  fishing trip to the Zambezi River combines
> visiting
> > with family (who live in Zimbabwe) and catching "bream" (mostly tilapia
>
>
> - Snip Snip
>
>

| Message 3  

Subject: Re: Help anyone!!
From:    RalphMcl 'at' aol.com
Date:    Mon, 4 Jun 2001 08:03:28 EDT

Many,many thanks Bruce.
Ralph

| Message 4  

Subject: Re: Aeration
From:    "Chris G" 
Date:    Mon, 04 Jun 2001 10:19:36 -0400

Very interesting, did they test all of these methods with the same amount of 
surface area of water/air interface?

Christopher

>From: dreadlox 'at' cwjamaica.com
>Reply-To: aquaponics 'at' townsqr.com
>To: aquaponics 'at' townsqr.com
>Subject: Aeration
>Date: Sun, 03 Jun 2001 02:24:38 -0700
>
>Just to back up my earlier claims. I found I had asked some questions on
>aeration back in 99
. here's part of that post.>
>
>
>Researchers at Auburn University evaluated the performance of many
>aerators and studied the effect of design features and operating
>conditions on performance. Results in terms of pounds of oxygen
>transferred per kilowatt of electrical power used are summarized below:
>
>
>                                        SAE lb O2/hp-hr
>                                      -----------------
>         Aerator type             Average          Range
>        --------------            --------        -----------
>     Paddle wheel, all types       3.1            1.6 - 4.3
>     Propeller-aspirator pump      2.3            1.9 - 2.6
>     Vertical pump                 2.0            1.0 - 2.6
>     Pump sprayer                  1.9            1.3 - 2.8
>     Diffusion                     1.3            1.0 - 2.3
>
>
>
>
>
>
>
>Somewhere in someones literature it says:
>
>Performance
>
>The ability of an aerator to transfer oxygen to water is expressed as
>the standard oxygen transfer rate (SOTR) and the standard aerator
>efficiency (SAE). The SOTR is the amount of oxygen that an aerator will
>transfer in 1 hour to clear freshwater at 20°C which contains 0 mg/I DO.
>SOTR usually is expressed as pounds of oxygen per hour. The SAE is
>simply the SOTR divided by power input; it normally is expressed as
>pounds of oxygen per kilowatt~hour or pounds of oxygen per horsepower.
>Power input may be expressed as power applied to the aerator shaft
>(brake power) or the electricity consumption by the aerator (wire
>power); it is best for practical purposes to express SAE in terms of the
>rated horsepower of the aeration unit. Standard conditions employed for
>presenting SOTR and SAE values seldom exist in aquaculture systems. As
>DO concentration and water temperature rises, actual oxygen transfer
>rate and actual aeration efficiency decrease with respect to SOTR and
>SAE. For example, at 30°C and 4 mg/I DO, an aerator would transfer only
>about 50% of the oxygen suggested by SOTR and SAE. Nevertheless, SOTR
>and SAE are important for they permit comparisons of efficiency among
>aerators.

| Message 5  

Subject: Re: Aeration
From:    "KenHale" 
Date:    Mon, 4 Jun 2001 10:43:44 -0500

Auburn is considered the top fishery university in the U.S. they test and
rate every product on  the market.

----- Original Message -----
From: "Chris G" 
To: 
Sent: Monday, June 04, 2001 9:19 AM
Subject: Re: Aeration

> Very interesting, did they test all of these methods with the same amount
of
> surface area of water/air interface?
>
> Christopher
>
> >From: dreadlox 'at' cwjamaica.com
> >Reply-To: aquaponics 'at' townsqr.com
> >To: aquaponics 'at' townsqr.com
> >Subject: Aeration
> >Date: Sun, 03 Jun 2001 02:24:38 -0700
> >
> >Just to back up my earlier claims. I found I had asked some questions on
> >aeration back in 99
. here's part of that post.> >
> >
> >
> >Researchers at Auburn University evaluated the performance of many
> >aerators and studied the effect of design features and operating
> >conditions on performance. Results in terms of pounds of oxygen
> >transferred per kilowatt of electrical power used are summarized below:
> >
> >
> >                                        SAE lb O2/hp-hr
> >                                      -----------------
> >         Aerator type             Average          Range
> >        --------------            --------        -----------
> >     Paddle wheel, all types       3.1            1.6 - 4.3
> >     Propeller-aspirator pump      2.3            1.9 - 2.6
> >     Vertical pump                 2.0            1.0 - 2.6
> >     Pump sprayer                  1.9            1.3 - 2.8
> >     Diffusion                     1.3            1.0 - 2.3
> >
> >
> >
> >
> >
> >
> >
> >Somewhere in someones literature it says:
> >
> >Performance
> >
> >The ability of an aerator to transfer oxygen to water is expressed as
> >the standard oxygen transfer rate (SOTR) and the standard aerator
> >efficiency (SAE). The SOTR is the amount of oxygen that an aerator will
> >transfer in 1 hour to clear freshwater at 20°C which contains 0 mg/I DO.
> >SOTR usually is expressed as pounds of oxygen per hour. The SAE is
> >simply the SOTR divided by power input; it normally is expressed as
> >pounds of oxygen per kilowatt~hour or pounds of oxygen per horsepower.
> >Power input may be expressed as power applied to the aerator shaft
> >(brake power) or the electricity consumption by the aerator (wire
> >power); it is best for practical purposes to express SAE in terms of the
> >rated horsepower of the aeration unit. Standard conditions employed for
> >presenting SOTR and SAE values seldom exist in aquaculture systems. As
> >DO concentration and water temperature rises, actual oxygen transfer
> >rate and actual aeration efficiency decrease with respect to SOTR and
> >SAE. For example, at 30°C and 4 mg/I DO, an aerator would transfer only
> >about 50% of the oxygen suggested by SOTR and SAE. Nevertheless, SOTR
> >and SAE are important for they permit comparisons of efficiency among
> >aerators.
>
> 
__________
> Get your FREE download of MSN Explorer at http://explorer.msn.com
>

| Message 6  

Subject: Remove from mailing list

.thank you
From:    Jakobihu 'at' aol.com
Date:    Mon, 4 Jun 2001 11:51:01 EDT

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could you please remove me from the mailing list, I am in the process of 
moving & cannot check me-mail often it really builds up

thank yoou

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could you please remove me from the mailing
list, I am in the process of 

moving & cannot check me-mail often it really builds up thank yoou
--part1_13.168b363e.284d0865_boundary-- | Message 7 Subject: Remove from mailing list From: "Todd Breunig" Date: Mon, 04 Jun 2001 11:10:36 -0500 This is a MIME message. If you are reading this text, you may want to consider changing to a mail reader or gateway that understands how to properly handle MIME multipart messages. --=_FEA4D305.EE8FF60F Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable could you please remove me from the mailing list Thank You --=_FEA4D305.EE8FF60F Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Description: HTML
could you please remove me from the = mailing=20 list
 
Thank You
 
--=_FEA4D305.EE8FF60F-- | Message 8 Subject: From: "Randy Salars" Date: Mon, 4 Jun 2001 11:10:54 -0600 This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C0ECE7.05B7B560 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable unsubscribe ------=_NextPart_000_0005_01C0ECE7.05B7B560 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
unsubscribe
------=_NextPart_000_0005_01C0ECE7.05B7B560-- | Message 9 Subject: Basic list instructions From: S & S Aqua Farm Date: Mon, 04 Jun 2001 12:17:55 -0500 III. SUBSCRIBE/UNSUBSCRIBE INFORMATION ************************************************************************* If you ever want to remove yourself from this list, send an e-mail to: aquaponics-request 'at' townsqr.com in the body (or message area) type: unsubscribe ************************************************************************* To post messages to the group, send e-mail to: aquaponics 'at' townsqr.com Messages to this address will AUTOMATICALLY BE BROADCAST TO ALL LIST MEMBERS. ************************************************************************* If you wish to subscribe to the digest format for this list, which will be sent once per day, send a message to: aquaponics-digest-request 'at' townsqr.com no subject. In the message body: subscribe ************************************************************************* Once confirmed, you may unsubscribe from the individual message format and avoid duplicate postings by sending a message to: aquaponics-request 'at' townsqr.com no subject In the message body: unsubscribe ************************************************************************* People will not be able to send messages to -- they will have to send any messages to ************************************************************************* If you ever need to get in contact with the owner of the list (comments, suggestions, questions), send e-mail to: snsaquasys 'at' townsqr.com. ************************************************************************* S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124 Web page http://www.townsqr.com/snsaqua/ | Message 10 Subject: Re: Help anyone!! From: "STEVE SPRING" Date: Mon, 4 Jun 2001 12:33:57 -0500 Hi Ralph, Man, Oh Man .I just want to be a lurker and not say anything, but that appears to be impossible. I wanted to say something before in relation to your catfish, but didn't .now, I feel guilty. What Bruce says is absolutely true. I stocked catfish in my pond 3 years ago. I have a very small pond. It is only "maybe 1/4 - 1/3 acre". It is well aerated in the winter time, but still covers in ice except for a very small area around the aerator .the catfish survive and breed quite well. "Cats" are very hardy. Steve ----- Original Message ----- From: "Bruce Schreiber" To: Sent: Sunday, June 03, 2001 8:59 AM Subject: Re: Help anyone!! Ralph Just so you know for the future the main and almost only cause of ick is thermal shock caused by too rapid of a temp. change.This happens most often when aquatic animals are not floated in the bag for long enough to gradually equalize the water temp. of their bags water to that of the tank water that they are to be released into. And It is the same sort of shock that gives us colds for not putting on our coat to go out to get the mail or something like that. Your catfish can live quite well in cold water under the ice so don't give up but next time have them put fewer to the bag so that you can flote them for say one hour before letting them loose and you wont get ick again Bruce | Message 11 Subject: Re: BASIL From: "STEVE SPRING" Date: Mon, 4 Jun 2001 12:40:08 -0500 TGTX .TED, et. al (Did you know?), Scary thought but, there are ultra microscopic "mites" living in all of our eyelashes. That is the only place that they live. Education is SCARY sometimes. So much for being a "lurker" huh? SS :) ----- Original Message ----- From: "TGTX" To: Sent: Sunday, June 03, 2001 9:24 AM Subject: Re: BASIL > Dear Claude > Thank you- I think my plants have all of the bacteria mentioned. Bugs I can > see: if I can see it, I can kill it. Bacteria are very scary. If I have > them: how do I get rid of them. No, No! Bacteria are not scary. Bacteria are everywhere. Ubiquitous! Pseudomonas sp. is everywhere on the planet. You have a happy layer of bacteria on your skin and a Gwadzillion of them on your hair throwing little microbe parties .As you move around in the air your hair is like an air filter collecting Gwadzillions of bacteria every day .that is, if you have hair on the head .nevermind The key is to try to control the environmental conditions as best as possible and not let the opportunistic little gremlins enter at the gate of opportunity that one may have left wide open. Ted | Message 12 Subject: Re: Affordable feed sources From: "STEVE SPRING" Date: Mon, 4 Jun 2001 12:49:22 -0500 Hi Darren, There must be some sort of feed store even in Western Washington. I missed the first part of this message. What are you trying to feed? If Tilapia .then the Purina 5DO8. It is +/- $16/$17/ 50# bag here locally in Milwaukee, Wi. LOL Steve ----- Original Message ----- From: "Darren Pearce" To: Sent: Sunday, June 03, 2001 11:43 AM Subject: Affordable feed sources Adrianna et al I live on the olympic peninsula in western Washington. My problem is that I've been buying fish food through pet stores, where even online and in bulk the best deal I can find works out to almost 5 dollars per pound.OUCH! Surely I have missed something. I would like to find a local/regional source of commercial fish feed, but due to the small size of my system, an appropriate method of storage is also needed.Ideas?? peas Darren | Message 13 Subject: Re: Affordable feed sources From: "STEVE SPRING" Date: Mon, 4 Jun 2001 12:56:38 -0500 DITTO Steve ----- Original Message ----- From: To: Sent: Sunday, June 03, 2001 7:03 PM Subject: Re: Affordable feed sources Try calling !-800-227-8941. Aqua Max Fish Diet feeds. Their brochure ha s and address of Purina Mill,Inc. 1401 South Hanley Road St. Louis, MO 63144 A 50 lb bag at our local Feed & Seed store, costs us just under 36 cents per lb. I usually buy 1 or 2 bags at a time and the dealer usually needs about 2 weeks notice to re-order. Hope this help. Bert | Message 14 Subject: Re: Aeration From: "Chris G" Date: Mon, 04 Jun 2001 14:04:57 -0400 Thanks Ken, But that didn't really answer my question. My question wasn't who did the study and how good they are, but what were the testing methods. Some people might have read into my question (which is easy to do in emails), that I was questioning the results or who did the study, I wasn't. Being a computer weenie and information leech, I wanted to know more about the study. Sorry if I implied otherwise. Christopher >From: "KenHale" >Reply-To: aquaponics 'at' townsqr.com >To: >Subject: Re: Aeration >Date: Mon, 4 Jun 2001 10:43:44 -0500 > >Auburn is considered the top fishery university in the U.S. they test and >rate every product on the market. > >----- Original Message ----- >From: "Chris G" >To: >Sent: Monday, June 04, 2001 9:19 AM >Subject: Re: Aeration > > > > Very interesting, did they test all of these methods with the same >amount >of > > surface area of water/air interface? > > > > Christopher > > > > >From: dreadlox 'at' cwjamaica.com > > >Reply-To: aquaponics 'at' townsqr.com > > >To: aquaponics 'at' townsqr.com > > >Subject: Aeration > > >Date: Sun, 03 Jun 2001 02:24:38 -0700 > > > > > >Just to back up my earlier claims. I found I had asked some questions >on > > >aeration back in 99 . here's part of that post.> > > > > > > > > > > >Researchers at Auburn University evaluated the performance of many > > >aerators and studied the effect of design features and operating > > >conditions on performance. Results in terms of pounds of oxygen > > >transferred per kilowatt of electrical power used are summarized below: > > > > > > > > > SAE lb O2/hp-hr > > > ----------------- > > > Aerator type Average Range > > > -------------- -------- ----------- > > > Paddle wheel, all types 3.1 1.6 - 4.3 > > > Propeller-aspirator pump 2.3 1.9 - 2.6 > > > Vertical pump 2.0 1.0 - 2.6 > > > Pump sprayer 1.9 1.3 - 2.8 > > > Diffusion 1.3 1.0 - 2.3 > > > > > > > > > > > > > > > > > > > > > > > >Somewhere in someones literature it says: > > > > > >Performance > > > > > >The ability of an aerator to transfer oxygen to water is expressed as > > >the standard oxygen transfer rate (SOTR) and the standard aerator > > >efficiency (SAE). The SOTR is the amount of oxygen that an aerator will > > >transfer in 1 hour to clear freshwater at 20°C which contains 0 mg/I >DO. > > >SOTR usually is expressed as pounds of oxygen per hour. The SAE is > > >simply the SOTR divided by power input; it normally is expressed as > > >pounds of oxygen per kilowatt~hour or pounds of oxygen per horsepower. > > >Power input may be expressed as power applied to the aerator shaft > > >(brake power) or the electricity consumption by the aerator (wire > > >power); it is best for practical purposes to express SAE in terms of >the > > >rated horsepower of the aeration unit. Standard conditions employed for > > >presenting SOTR and SAE values seldom exist in aquaculture systems. As > > >DO concentration and water temperature rises, actual oxygen transfer > > >rate and actual aeration efficiency decrease with respect to SOTR and > > >SAE. For example, at 30°C and 4 mg/I DO, an aerator would transfer only > > >about 50% of the oxygen suggested by SOTR and SAE. Nevertheless, SOTR > > >and SAE are important for they permit comparisons of efficiency among > > >aerators. > > > > __________ > > Get your FREE download of MSN Explorer at http://explorer.msn.com > > > | Message 15 Subject: Re: Aeration From: "Arlos" Date: Mon, 4 Jun 2001 11:32:21 -0700 Chris, There may be something else to consider in closed loop aquaponic operations which are the BOD and COD issues. How much extra O2 demands are place on a system. I wouldn't mind seeing a range of experience with aeration equipment regardless of studies performed under ideal lab conditions. Field variance and site conditions will through a curve into a 3rd party study. A paddle type aerator might be the perfect solution in a larger operation but not practical in a backyard or in a small greenhouse with a 500 gal tank. Just a few thoughts on this question Arlos -----Original Message----- From: Chris G To: aquaponics 'at' townsqr.com Date: Monday, June 04, 2001 11:05 AM Subject: Re: Aeration >Thanks Ken, > >But that didn't really answer my question. My question wasn't who did the >study and how good they are, but what were the testing methods. Some people >might have read into my question (which is easy to do in emails), that I was >questioning the results or who did the study, I wasn't. Being a computer >weenie and information leech, I wanted to know more about the study. > >Sorry if I implied otherwise. > >Christopher > >>From: "KenHale" >>Reply-To: aquaponics 'at' townsqr.com >>To: >>Subject: Re: Aeration >>Date: Mon, 4 Jun 2001 10:43:44 -0500 >> >>Auburn is considered the top fishery university in the U.S. they test and >>rate every product on the market. >> >>----- Original Message ----- >>From: "Chris G" >>To: >>Sent: Monday, June 04, 2001 9:19 AM >>Subject: Re: Aeration >> >> >> > Very interesting, did they test all of these methods with the same >>amount >>of >> > surface area of water/air interface? >> > >> > Christopher >> > >> > >From: dreadlox 'at' cwjamaica.com >> > >Reply-To: aquaponics 'at' townsqr.com >> > >To: aquaponics 'at' townsqr.com >> > >Subject: Aeration >> > >Date: Sun, 03 Jun 2001 02:24:38 -0700 >> > > >> > >Just to back up my earlier claims. I found I had asked some questions >>on >> > >aeration back in 99 . here's part of that post.>> > > >> > > >> > > >> > >Researchers at Auburn University evaluated the performance of many >> > >aerators and studied the effect of design features and operating >> > >conditions on performance. Results in terms of pounds of oxygen >> > >transferred per kilowatt of electrical power used are summarized below: >> > > >> > > >> > > SAE lb O2/hp-hr >> > > ----------------- >> > > Aerator type Average Range >> > > -------------- -------- ----------- >> > > Paddle wheel, all types 3.1 1.6 - 4.3 >> > > Propeller-aspirator pump 2.3 1.9 - 2.6 >> > > Vertical pump 2.0 1.0 - 2.6 >> > > Pump sprayer 1.9 1.3 - 2.8 >> > > Diffusion 1.3 1.0 - 2.3 >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > >Somewhere in someones literature it says: >> > > >> > >Performance >> > > >> > >The ability of an aerator to transfer oxygen to water is expressed as >> > >the standard oxygen transfer rate (SOTR) and the standard aerator >> > >efficiency (SAE). The SOTR is the amount of oxygen that an aerator will >> > >transfer in 1 hour to clear freshwater at 20°C which contains 0 mg/I >>DO. >> > >SOTR usually is expressed as pounds of oxygen per hour. The SAE is >> > >simply the SOTR divided by power input; it normally is expressed as >> > >pounds of oxygen per kilowatt~hour or pounds of oxygen per horsepower. >> > >Power input may be expressed as power applied to the aerator shaft >> > >(brake power) or the electricity consumption by the aerator (wire >> > >power); it is best for practical purposes to express SAE in terms of >>the >> > >rated horsepower of the aeration unit. Standard conditions employed for >> > >presenting SOTR and SAE values seldom exist in aquaculture systems. As >> > >DO concentration and water temperature rises, actual oxygen transfer >> > >rate and actual aeration efficiency decrease with respect to SOTR and >> > >SAE. For example, at 30°C and 4 mg/I DO, an aerator would transfer only >> > >about 50% of the oxygen suggested by SOTR and SAE. Nevertheless, SOTR >> > >and SAE are important for they permit comparisons of efficiency among >> > >aerators. >> > >> > __________ >> > Get your FREE download of MSN Explorer at http://explorer.msn.com >> > >> > > __________ >Get your FREE download of MSN Explorer at http://explorer.msn.com > > | Message 16 Subject: RE: Temperature ranges From: "Charlie Shultz" Date: Mon, 04 Jun 2001 18:40:30 Brother-Mike, As I mentioned, we have 6 identical aquaponic units where we will conduct our chilling research. We will be comparing "high-tech" electric chillers with "low-tech" homemade evaporative coolers. We will also have 2 systems with no temperature regulation, our controls. We anticipate the cost for running the electric chillers will be astronomical and we are shooting for success with the homemade units. Don Bailey can give you more specs if you would like. I'll be plating roots throughout the experiment looking for the presence of Pythium fungus species. Hopefully, as we drop below 76F we will see the fungus disappear. We'll see and we'll let you know. Always yours, Charlie <<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>> Subject: Re: Temperature ranges From: dreadlox 'at' cwjamaica.com Date: Sun, 03 Jun 2001 02:55:16 -0700 Charlie how will you try to cool the root zones? By what methods of chilling? Anyways mon.Jus chill . and cool breeze to you :> Greetings. Mike JAMAICA. | Message 17 Subject: Thanks go Out From: "Charlie Shultz" Date: Mon, 04 Jun 2001 18:49:06 Carol and Arlos, Thanks to you both for your input on Worm Systems. I'm leaning toward builing my own unit. The websites mentioned should provide plenty of vermi-info. Respects! Ted, Big t'anks for your in depth explaination of mineralization and nitrification considerations. That one goes in my files. Charlie St. Croix, USVI | Message 18 Subject: Re: Temperature ranges From: LHaver1038 'at' aol.com Date: Mon, 4 Jun 2001 14:50:12 EDT | Message 19 Subject: RE: Temperature ranges From: fishmanbruce 'at' webtv.net (Bruce Schreiber) Date: Mon, 4 Jun 2001 17:18:57 -0500 (CDT) Jim There is a whole range of cold water fish out there for you to pick from any fish native to north America should work for you. Bruce | Message 20 Subject: Re: Affordable feed sources From: fishmanbruce 'at' webtv.net (Bruce Schreiber) Date: Mon, 4 Jun 2001 17:22:47 -0500 (CDT) Darren Any feed store that deals with live stock growers will get it for you than you just keep it in barrels Bruce | Message 21 Subject: Re: Giant earth worms From: fishmanbruce 'at' webtv.net (Bruce Schreiber) Date: Mon, 4 Jun 2001 17:39:07 -0500 (CDT) Ted Margi thinks it was you talking about the giant earth worms (that I saw in the national geographic magazine when i was a kid )from the Zambize river dranage They grew to about 5 or 6 ft. and were hunted buy the natives and cut up into steaks of about 6 inches acrost and were fryed and eaten Bruce | Message 22 Subject: Re: Africa From: fishmanbruce 'at' webtv.net (Bruce Schreiber) Date: Mon, 4 Jun 2001 18:03:22 -0500 (CDT) Margi I am no Journalist just a guy with a life long interest in Africa among other things and a near photographic memory. Can you get Belhousea from swimming in the Zambezi,Do you still need to be guarded from crocks buy rifle men when swimming in it. And what do you call that worm that grows out of the natives and that needs to be slowly wound up on a split match stick to remove so it does not break and kill the native buy blood poisoning Bruce | Message 23 Subject: Re: Fwd. fish sp for acuaponics HELP From: fishmanbruce 'at' webtv.net (Bruce Schreiber) Date: Mon, 4 Jun 2001 18:16:33 -0500 (CDT) Pablo If you can get a supply of Pacu do so they grow very fast and are very superior eating and you can feed them old fruit and anything vegetable Bruce | Message 24 Subject: Re: Giant earth worms From: "TGTX" Date: Mon, 4 Jun 2001 20:01:36 -0500 > Ted Margi thinks it was you talking about the giant earth worms > (that I saw in the national geographic magazine when i was a kid )from > the Zambize river dranage They grew to about 5 or 6 ft. and were hunted > buy the natives and cut up into steaks of about 6 inches acrost and were > fryed and eaten > Bruce Hunted? Hunted? Shades of Dune! What am I, as planetary ecologist going to do now? Mine the Spice! Ted (M'uadib's golf caddy) | Message 25 Subject: Re: Fwd. fish sp for acuaponics HELP From: pablo obiaga Date: Tue, 05 Jun 2001 00:21:27 -0300 At 18:16 4/06/01 -0500, you wrote: >Pablo If you can get a supply of Pacu do so they grow very fast and >are very superior eating and you can feed them old fruit and anything >vegetable > Bruce Bruce, What you say sounds great. Something like an acuatic porc. In photografs from the site I posted, it looks yummy. I've never eaten it. On the southern part of the country, by the sea, sea food is what you can get. Eventually that may be the marketing difference that may sell. As for now, I'm more concearned on how to get them alive to my kitchen. Wuold it be wrong to consider half the density of tilapia? The same source I took the info from, asignes DO 0,8 mg/l for tilapia, and 1,5 mg/l for Pac=FA. I know that to raise them well 4-5 DO is needed for tilapia but, since it seems no one has tryed intensive fish raising in acuaponics with these species before, provided I could get 4-5-6 DO expected in an S&S system. What I need to know if this kind of reasoning is valid. Since, it is usually asigned a density around 1/4-1/2 pound of Tilapia per gallon of tank water, would it be correct to think about 1/8-1/4 for Pac=FA? I don't now if oxygen is THE limitant parameter for fish density, provided you mantain water clean, and feed them well. Given these, I could only think of oxygen needs and behavior. The latter if no literature is aveilable, i guess i'll have to watch and see. But thats what we do since kids with our new toys or new pets getting to know them. Spend lots of time with them. That's part of the fun. Thank you for your coments, Pablo

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