Aquaponics Digest - Sat 01/30/99
Message 1: Crop King
from "KevinLReed"
Message 2: aerobic oxygen
from "Jorg D. Ostrowski"
Message 3: water storage
from William Evans
Message 4: Grass clippings
from "KevinLReed"
Message 5: Re: aquaponic swimming pool: chlorine
from "KevinLReed"
Message 6: Re: Crop King
from Hydro/Aquatic Tech
Message 7: Re: aerobic oxygen
from doelle
Message 8: Aerobic Oxygen Experiment
from Michael Strates
Message 9: Re: Stupid Question
from Michael Strates
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| Message 1 |
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Subject: Crop King
From: "KevinLReed"
Date: Fri, 29 Jan 1999 23:04:19 -0800
Hi All,
I have seen someinformation on Crop King Greenhouses and NFT systems.
I had a few questions that someone in group may be able to answer.
First has anyone had experience with Crop King Greenhouses, if so what do
you think of thier products.
Second do you think it may be possible to use the S&S ebb and flow nodes
along with a connected NFT system. Plants with needs for higher nutrient
levels could grown in the conventional S&S node. The water before being
returned to the fish tank would first run through the NFT system for lettuce
or plants wth lower nutrient needs. It seems that if the total square feet
of growing area are kept in the proper ration to the cubic feet of the fish
tanks. I am wondering if the additional aeration of roots in the NFT part of
system could be balanced with the more cost effective closed loop S&S grow
bed node.
I am interested in your thoughts.
Kevin
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Subject: aerobic oxygen
From: "Jorg D. Ostrowski"
Date: Sat, 30 Jan 1999 07:04:00 -0700 (MST)
Horst: Further to your message of below, my literature says:
"aerobic oxygen kills all anaerobic (infectious) bacteria while leaving
untouched bacteria that is harmless/good for you" for "long term storage
of drinking water".
Have you or anyone actually used aerobic oxygen and has there been any
application research done on this? Which is true, the above or below?
My interest is to treat stagnant greywater without mechanical means.
Jorg Ostrowski
______________________________________________________________________
Pure oxygen is poisonous to the bacteria. Certainly anaerobes will not
grow,
but you are also in danger of killing all aerobes and thus finish up with
a
somewhat sterile compost heap.
Aeration is much better, as air is, of course, not pure oxygen and thus
can be
tolerated by some facultative anaerobes and certainly by aerobes.
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| Message 3 |
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Subject: water storage
From: William Evans
Date: Sat, 30 Jan 1999 06:34:35 -0800
I believe Mollison recommends limstone in the storage tank.Not in
powdered form but solid, or limit diffusion w/ paper barrier I know that
powdered limestone will aggregate/solidify again if wet and then allowed
to dry.And maybe a couple of "silver" dollars dropped in as well for
good luck.
billevans
> My interest is to treat stagnant greywater without mechanical means.
>
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Subject: Grass clippings
From: "KevinLReed"
Date: Sat, 30 Jan 1999 11:42:03 -0800
Hello All,
In Southern California we have an unlimited supply of grass clippings and
other free composting material easily available. We have been using our
mostly in large barrel composters with a geared crank on the side to cycle
this material. These type of composters work very quickly so we always have
good material for the outdoor gardens.
I wonder if this could be the basis for feeding our fish and hence the
aquaponic node.
I have a few lawn areas that can be planted with grasses that are high
relatively high in nutrient content ( some of these can even be sold live to
local pet stores for small animal nutrient supplements).
Is it more efficient to feed the fish the grasses, either as grass/pasta
pellets or plain, or is it better to compost and vermiculture to use worm
castings and composted material?
Once again I am interested in your thoughts.
Kevin
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| Message 5 |
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Subject: Re: aquaponic swimming pool: chlorine
From: "KevinLReed"
Date: Sat, 30 Jan 1999 11:54:30 -0800
I moved into a house that had a very green and growing swimming pool when I
was about 19 years old. The Vector Control agency had spotted the pool
already I guess so when we moved in they had already done thier little
helicopter drop of mosquito fish into the pool ( little guppy looking guys).
We cleaned up the pool but just left them in when we refilled it and after a
subsequnt party we found that serveral oscars from the indoor fish tank were
now also in the pool. We left the oscars in too. The upshot was that we did
go a little light on the clorine and acid but enough to keep the pool clear
and all of these fish thrived ... they were still getting bigger and the
mosquito fish were still breeding though the oscars never did and since
there were only 3 they may not have been male/female mix.
Kevin
-----Original Message-----
From: Michael Strates
To: aquaponics@townsqr.com
Date: Thursday, January 28, 1999 12:18 PM
Subject: Re: aquaponic swimming pool
>On Tue, 26 Jan 1999, jilli and lars wrote:
>
>jal> chlorine, but obviously not as dangerous to _all_ living things.
>jal> I've been thinking about integrating salt water into a larger
>
>--
>
>
>
>
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Subject: Re: Crop King
From: Hydro/Aquatic Tech
Date: Sat, 30 Jan 1999 16:26:17 -0800
> Hi All,
> I have seen someinformation on Crop King Greenhouses and NFT systems.
> I had a few questions that someone in group may be able to answer.
> First has anyone had experience with Crop King Greenhouses, if so what do
> you think of thier products.
I've spent several weeks last year in CropKing greenhouses at the
CropKing headquarters in Medina Ohio while designing/installing several
prototype aquaponic and aquaculture systems for them. The structures
are well designed and durable, though not as technologically innovative
as some of the newer models put out by Jaderloon and Rough Brothers (but
not
as expensive as Jaderloon or RB either.) CropKing specializes in
double poly (soft skinned) greenhouses, they don't handle the
polycarbonate structured sheet (PSS) hard-shell houses except on special
order. They also have a separate division (ShelterKing) that handles a
greenhouse framed structure that uses opaque covers similar to VERY
heavy duty tarps rather than transparent plastic that are ideal for low
cost aquaculture operations.
A double bay greenhouse frame with one bay covered with poly and the
other bay covered with the tarp material would be ideal for aquaponics.
Run the plants in the natural light of the greenhouse glazed side, run
the fish in the covered side to reduce algae growth and get better
thermal savings. With a split system like this (and a dividing wall
between the two halves) you can run the plants at THEIR desired
temperatures and humidity, while optimizing the temperature and humidity
for the fish in THEIR half.
Scott Jones
Hydro/Aquatic Technologies
Aquaponic consultants and suppliers
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| Message 7 |
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Subject: Re: aerobic oxygen
From: doelle
Date: Sun, 31 Jan 1999 09:07:30 +1100
>Date: Sun, 31 Jan 1999 09:06:24 +1100
>To: "Jorg D. Ostrowski" <
>From: doelle <
>Subject: Re: aerobic oxygen
>In-Reply-To: <
>References: <<3.0.1.32.19990130141737.006dce14@ozemail.com.au>
>
>Jorg, Very often one mixes up aeration and the need opf the aerobic
bacteria for oxygen. You will never find anybody using 'pure oxygen' to grow
microorganisms. Oxygen is always mixed with nitrogen or one uses 'aeration'
which means air.
>The reason for the poisonous effect are the oxygen radicals in pure oxygen,
which work like ozone or worse. I could give you a whole lecture on this use
with the special enzymes required to tolerate oxygen etc etc, but that is
not what you want.
>Just remember: Aeration or aerobic metabolism is the use of air in the
medium, from which the organism takes the oxygen for its metabolism. In such
mixtures there are no oxygen radicals.
>I hope I was able to explain the difference between air and oxygen use for
microbial growth.
>If you have any further question, please ask.
>Why don't you pump air into the compost, which is cheaper and possibly much
more effective for your purpose.
>Best regards
>Horst
>At 07:04 AM 30/01/99 -0700, you wrote:
>>
>>Horst: Further to your message of below, my literature says:
>>"aerobic oxygen kills all anaerobic (infectious) bacteria while leaving
>>untouched bacteria that is harmless/good for you" for "long term storage
>>of drinking water".
>>
>>Have you or anyone actually used aerobic oxygen and has there been any
>>application research done on this? Which is true, the above or below?
>>
>>My interest is to treat stagnant greywater without mechanical means.
>>Jorg Ostrowski
>>______________________________________________________________________
>>Pure oxygen is poisonous to the bacteria. Certainly anaerobes will not
>>grow,
>>but you are also in danger of killing all aerobes and thus finish up with
>>a
>>somewhat sterile compost heap.
>>Aeration is much better, as air is, of course, not pure oxygen and thus
>>can be
>>tolerated by some facultative anaerobes and certainly by aerobes.
>>
>>
>>
Horst W.Doelle, D.Sc., D.Sc. [h.c.]
Chairman, IOBB
Director, MIRCEN-Biotechnology
FAX: +617-38783230
Email: doelle@ozemail.com.au
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Subject: Aerobic Oxygen Experiment
From: Michael Strates
Date: Mon, 1 Feb 1999 01:06:41 +1100 (EST)
Okay,
I have 100ml of chlorine dioxide (aerobic oxygen), and eight plates. Plate
one will be innoculated with fecal coliform bacteria, two with e.coli
(humanure strain), three with anerobic digester "starter" fluid, and the
forth with aerobic compost starter liquid.
The second set of four plates will be left untouched, while the first set
of plates will be innoculated each with 10ml of chlorine dioxide.
I also have six tanks of gambusia (mosquito fish), and each will be
inncoulated with varying amounts of calcium hypochlorite, chlorine
dioxide and hydrogen peroxide to determine a LD for gambusia.
I hope to have some definite information on how much of these chemicals
may be added to the water before death of the fish results.
As for wasting fish - I have several THOUSAND gambusia in a pond.
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| Message 9 |
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Subject: Re: Stupid Question
From: Michael Strates
Date: Mon, 1 Feb 1999 01:28:29 +1100 (EST)
On Sat, 30 Jan 1999, doelle wrote:
d> Aeration is much better, as air is, of course, not pure oxygen and
d> thus can be tolerated by some facultative anaerobes and certainly by
d> aerobes.
I'm after the most optimimum level for formation of lots of heat. Anybody
know the optimum level of O2 for aerobes (not to heavy, not too light :)..
I was thinking of trying around 35%.. anybody know the upper limit?
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