Aquaponics Digest - Sun 12/07/97
Message 1: Response
from S & S Aqua Farm
Message 2: Re: Just the Tanks
from GCR
Message 3: past posts
from Donna Fezler
Message 4: Re: Dissolved Oxygen
from Gordon Watkins
Message 5: Re: past posts
from Gordon Watkins
Message 6:
from George Kunkel
Message 7: Re: past posts
from "H.Doelle"
Message 8:
from Goldberg
Message 9: Re: Commercial aquaculture
from GROMAXaz
Message 10: Re: Commercial aquaculture
from GROMAXaz
Message 11: Re: Commercial aquaculture
from "Chris Worth"
Message 12: Re: Aluminum
from Frank Hartman
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| Message 1 |
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Subject: Response
From: S & S Aqua Farm
Date: Sun, 07 Dec 1997 09:24:16 -0600
Hi all -
Just got back from a value-added ag conference. I see several messages that
we should respond to (read through very quickly late last night). I'll try
to get to them today. If you've been expecting comment from us and didn't
see it, it's because we've not been here. Didn't want anyone to think we
had abandoned this great list!
Thanks so much for your participation and ideas.
Paula Speraneo
S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
Web page http://www.townsqr.com/snsaqua/
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| Message 2 |
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Subject: Re: Just the Tanks
From: GCR
Date: Sun, 07 Dec 1997 10:20:12 +0000
Do Rubbermaid stock tanks work?
At 08:25 AM 12/5/97 -0600, Gordon Watkins wrote:
>The cheapest tanks I've seen are kiddie pools. Aquatic Eco-Systems
>(800-422-3939) carries several inexpensive tanks including a 500 gallon
>frame type kiddie pool for $64, a 750 gal portable tank for $400, and
>galvanized stock tanks with pvc liners up to 19,450 gallons. Just be
>sure the materials are non-toxic.
> Gordon
>
>>
>>
>>
>>
>
>
Donna Fezler@rhealiving.com
GCR
1620 Baldwin Road
Jacksonville, IL 62650
USA
(217) 243-7683, fax 245-2919
*Leading the world in Rhea Research and Product Innovation
*Inventor of the dietary supplement Rhea Extract
*Pioneering research on the role of environmental toxins in autoimmune
disorders
(web page temporarily offline while we change servers)
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Subject: past posts
From: Donna Fezler
Date: Sun, 07 Dec 1997 10:20:53 +0000
As a newcomer to this list, I appreciate the work you are doing. I would
like to get the old posts, is there an archive to this list?
I am especially interested in the feeding of animal wastes to the fish. I
raise rheas, South American ostriches, which have very particular
requirements including zero environmental toxin exposure for the first
three months. I would be using the fish as an unadulterated protein source
for the babies and the vegetables for personal consumption.
Can this be done indoors or is an outdoor greenhouse a necessity?
Can crawfish be raised as bottom feeders? (16 years as a resident of New
Orleans)
Do tilapia make good sashimi? (3 years as a resident of South Korea?)
How do you kill the fish? Cold water?
Please don't laugh. My questions are going to get worse before they get
better.
Donna Fezler
Healing energy in a bottle - Rhea capsules
Reply to gcr@rhealiving.com
http://www.rhealiving.com
(217) 243-7683 FAX (217) 245-2919
RR1 Box 97B Jacksonville, IL 62650
USA
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Subject: Re: Dissolved Oxygen
From: Gordon Watkins
Date: Sun, 07 Dec 1997 10:43:03 -0600
Ian Beaver wrote:
>
> Gordon Watkins wrote:
> >
> > I'd like to know what DO levels folks are maintaining in your systems.
> > Also how and how often you monitor and how you maintain adequate levels.
> > I'm using the Lamotte titration kit which is pretty cumbersome for
> > repetitive tests but is supposed to be accurate. I'd love to have a DO
> > monitor but they're a little too pricey. Has anyone used the Vital Sine
> > or Pinpoint DO meters?
> > My levels are running around 5.25 ppm which I maintain with an
airstone
> > in each 300 gallon section of my vat, and by cycling the water through
> > my beds 4.5 times per day (turnover rate). I only test every week or so
> > or if I suspect a problem.
> > Regards, Gordon
>
> Gordon
> Are you able to be specific about the amount of air you are passing
> through your airstones, ie the size of your air pump. I have been
> wondering on this subject, ie how much air do you need to pump in to a
> given water volume to keep the DO levels up. My observations also
> suggest that not all airstones are born equal.
>
> Ian Beaver
> Northland, New Zealand
You're absolutely right, Ian, there's tremendous variability among
airstones plus a given airstone's efficiency decreases over time so it's
important to clean or replace them regularly.
Mine are medium pore, glass bonded diffusers with a cfm of .10. My air
pump produces 1.6 cfm@1 psi.
Basically, airstones are a pain in the butt. Because I already had an
air pump for my breeding operation, I put the excess air to use in my
stock tanks. I also suspend the stones about 6 inches above my
submersible pumps which causes detritus to accumulate at the intake, so
I get double duty from them.
The amount of air required to keep DO levels up with an airstone
depends on several variables, including temp, BOD, bubble size,
submergence depth (contact time), etc. One rule of thumb is 100 lbs of
.50 lb fish require .04 lbs of O2 per hour.
What have folks found to be the optimum DO range for tilapia? My range
of 4.5 to 5.25 ppm seems a little low but I would appreciate some input
to confirm.
Thanks, Gordon
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Subject: Re: past posts
From: Gordon Watkins
Date: Sun, 07 Dec 1997 11:08:47 -0600
Donna Fezler wrote:
>
>
> I am especially interested in the feeding of animal wastes to the fish. I
> raise rheas, South American ostriches, which have very particular
> requirements including zero environmental toxin exposure for the first
> three months. I would be using the fish as an unadulterated protein source
> for the babies and the vegetables for personal consumption.
Just keep in mind that how unadulterated the fish are depends on what
you feed them. Also, see some of the previous posts re:feeding manures
to fish.
>
> Can this be done indoors or is an outdoor greenhouse a necessity?
A heated space is required for year-round production of tilapia and
most vegetables. By indoors do you mean in your house rather than a
greenhouse? By outdoor greenhouse do you mean free-standing as opposed
to attached or are you talking about a lath house or some other unheated
structure? You could install a small aquaponic system in your house but
if it gets very large, humidity will become a problem. If you're
considering much production you would probably want to be able to
isolate it from your living areas, particularly in the warm months. I
have an attached greenhouse with big sliding windows between it and my
house that I open in the winter and close in the summer. Also, unless
you're willing to invest in expensive lighting, you'll need the sunlight
of a greenhouse for successful vegetable production.
> Can crawfish be raised as bottom feeders? (16 years as a resident of New
> Orleans)
An interesting idea and it could probably be done if you can keep them
from escaping and burrowing into your beds! I wouldn't keep them with
your fish, however, as they're very predatory.
>
>
> Please don't laugh. My questions are going to get worse before they get
> better.
Don't worry. The only stupid questions are the ones that don't get
asked.
BTW, what're Rhea Capsules?
Regards, Gordon Watkins
>
>
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From: George Kunkel
Date: Sun, 07 Dec 1997 14:10:33 -0500
Two questions. First I grow nft lettuce in trays without any difficulty.
Yet when I try to grow spinach in the same system I get very mediocre
results. E.C. kept around 2, pH about 6.0 night temp about 62-64 [for the
associated but separate system tomatoes]. Spinach [tyee] germinated in
oasis cubes, same as lettuce, but poor root system evolution in the trays.
What to do? Next, in a separate house grow roses in containers with gravel
and intermittent fertigation without problems but looking for an
inexpensive lightweight media to replace oh-so-heavy stone. The fired clay
material is of course great, but last time I checked it was unbelievably
expensive even in bulk. Freight costs are a consideration too [I live in
Harrisburg, PA ]. Any thoughts [hope]. Thank you, George Kunkel
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Subject: Re: past posts
From: "H.Doelle"
Date: Mon, 08 Dec 1997 08:42:25 +1100
Dear Donna,
PLEASE BE EXTREMELY CAREFUL USING ANIMAL WASTE FOR FIS FEED !! My very
strong recommendation is : DO NOT under any circumstances use raw animal
waste. It has to be treated first in a digester or as compost or exposed to
thermophilic heat to kill the pathogens !
This is particularly important as you will be or planned to use fish as a
protein source for babies, which do not have the immune system to combat
pathogens !
Just a warning as a microbiologist !
Best regards
Horst Doelle
Horst W.Doelle,D.Sc.
Director, MIRCEN-Biotechnology Brisbane
Chairman, IOBB
Hon.Member of Depts. Microbiology & Chemical Engineering
FAX: +617-38783230
Email: H.Doelle@mailbox.uq.edu.au
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Subject: Re: Commercial aquaculture
From: GROMAXaz
Date: Sun, 7 Dec 1997 17:55:14 EST
In a message dated 97-12-05 10:55:21 EST, you write:
<< Ben,
Do you know where such small extruders can be purchased and the price
range? I'm interested in home-made extruded feeds not only for fish but
poulty as well.
Thanks, Gordon
>>
Gordon,
I don't have any infromation on suppliers at this time. Wenger is a
manufacturer of large capacity extruders, but I had found an import from
Germany that cost aroud $3000. and I have also seen a Japanese manufactured
model for less money. I've been out of the business to long to be current. I
will look around and let you know.
Ben
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| Message 10 |
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Subject: Re: Commercial aquaculture
From: GROMAXaz
Date: Sun, 7 Dec 1997 17:51:31 EST
In a message dated 97-12-05 10:55:21 EST, you write:
<< Ben,
Do you know where such small extruders can be purchased and the price
range? I'm interested in home-made extruded feeds not only for fish but
poulty as well.
Thanks, Gordon
>>
Gordon,
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| Message 11 |
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Subject: Re: Commercial aquaculture
From: "Chris Worth"
Date: Mon, 08 Dec 97 00:12:55
I of course understand what an extruder is
However, in this context what would you call them? a Feed Extruder(?) I'm
just interested in getting a relatively specific name so I know what to
search for.
I'm thinking about this as a future business, aquaponices that is.
thanks
Chris
On Sun, 7 Dec 1997 17:55:14 EST, GROMAXaz wrote:
>In a message dated 97-12-05 10:55:21 EST, you write:
>
><< Ben,
> Do you know where such small extruders can be purchased and the price
> range? I'm interested in home-made extruded feeds not only for fish but
> poulty as well.
> Thanks, Gordon
> >>
>Gordon,
> I don't have any infromation on suppliers at this time. Wenger is a
>manufacturer of large capacity extruders, but I had found an import from
>Germany that cost aroud $3000. and I have also seen a Japanese manufactured
>model for less money. I've been out of the business to long to be current. I
>will look around and let you know.
>
>Ben
>
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| Message 12 |
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Subject: Re: Aluminum
From: Frank Hartman
Date: Sun, 07 Dec 1997 23:23:34 -0500
As long as we are posting warnings.
Do not use aluminum in nay form and be sure it is not used as a stabilizer
in food.
Aluminum toxicity is a serious problem in agriculture, fish trees and mammals.
Aluminum has threepositive ions and destroys increase the surface tension
and destroys the capabilty to move material in solution. the problem will
show up in many forms bustay away from Aluminum,boron, chrome, manganese and
iron.
Of these aluminum is the most common.
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