Aquaponics Digest - Wed 04/14/99
Message 1: Permaculture list
from Jose Pelleya
Message 2: cannons
from Jose Pelleya
Message 3: Re: Start up
from Adriana Gutierrez & Dennis LaGatta
Message 4: Re: Growing Beds
from "Doug Basberg"
Message 5: Re: Growing Beds
from S & S Aqua Farm
Message 6: Re: Help! Help! Help! Rookies going down!!!
from Gordon Watkins
Message 7: Re: Plastic Alternatives
from "Sam Levy"
Message 8: Re: Fish killing methods etc.
from "Sam Levy"
Message 9: Re: Tilapia Feed
from Gordon Watkins
Message 10: Re: Permaculture list
from S & S Aqua Farm
Message 11:
from "Patricia Foreman"
Message 12: Re: Permaculture list
from Jose Pelleya
Message 13: Re: Permaculture list
from "Uwe Bruenjes"
Message 14: Re: Growing Beds
from Craig & Robin Prince
Message 15: Re: Aquatic microbiology again. Was: redclaw identification
from "William Brown"
Message 16: Re: Cover
from "William Brown"
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Subject: Permaculture list
From: Jose Pelleya
Date: Tue, 13 Apr 1999 21:45:53 -0600
Uwe:
Can you give me the address to get on that list?
Thanks,
Jose
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Subject: cannons
From: Jose Pelleya
Date: Tue, 13 Apr 1999 22:06:45 -0600
Definitely interested in the bamboo potato cannons
Jose
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Subject: Re: Start up
From: Adriana Gutierrez & Dennis LaGatta
Date: Wed, 14 Apr 1999 06:41:55 -0400
Jim,
When I was assessing my alternatives for a system I converted Paula's
ratios to square feet of planting area:gallons of fish water under the
assumption that the depth of the beds is related more to the nature of
the system. Therefore the same size fish tank can provide the nutrient
needs of the same square footage of 1 foot deep gravel beds in a flood
and drain system or 3 inch deep perlite drip beds.
Adriana
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Subject: Re: Growing Beds
From: "Doug Basberg"
Date: Wed, 14 Apr 1999 06:49:44 -0500
Craig means slope from 'top' of growing bed to 'base' where he picks up the
water to return to fish tank. Kind of like the slope in an eave traugh or
roof pitch. Not a falls, like in waterfalls. If the bed was level the
water would not flow. I think a little more slope would be better (0.5" to
1" per foot), but I believe his slope will work with a low pump duty cycle.
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Subject: Re: Growing Beds
From: S & S Aqua Farm
Date: Wed, 14 Apr 1999 08:56:39 -0500
At 06:49 AM 4/14/99 -0500, Doug wrote:
>Craig means slope from 'top' of growing bed to 'base' where he picks up the
>water to return to fish tank. Kind of like the slope in an eave traugh or
>roof pitch. Not a falls, like in waterfalls. If the bed was level the
>water would not flow. I think a little more slope would be better (0.5" to
>1" per foot), but I believe his slope will work with a low pump duty cycle.
>
Thanks, Doug. I would have understood that if my brain had been screwed on
straight yesterday.
We use a 1-1/2" lift at the top of an 8' bed to speed flow to the drain at
the lower end, with good results.
Paula
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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Subject: Re: Help! Help! Help! Rookies going down!!!
From: Gordon Watkins
Date: Wed, 14 Apr 1999 09:35:37 -0500
I agree with Ron that it sounds like Ich. Having recently lost several hundred
pounds of tilapia to this parasite, here's my advice:
Remove ALL fish from your system to a vessel where they can be treated
without affecting your growing beds. Be sure to remove everything, including any
fry, so as to leave no hosts for the parasite. Drain the aquaponic fish tank,
scrub with bleach, rinse well, let dry and refill with fresh water and maintain
at 80 degrees F. and circulate through your beds as usual. Do not add any fish
for a minimum of 2 weeks. This will eliminate all Ich parasites from the system
(assuming you have no frogs in your beds).
As for treatment of your surviving fish, salt is very effective for tilapia
but not so well tolerated by the other species you mention. For tilapia: raise
the water temp to 85. This will speed up the life cycle of the parasite which is
only treatable during its free-swimming phase. Add salt (I use Pickling Salt
available from the grocery stores. Avoid iodized salt. Use aquarium salt if
necessary, although it's more expensive.) at a rate of 3 ppm per day for 3 days
and maintain at around 10 ppm for 2 weeks. 1 week will probably cure the problem
but 2 weeks will for sure.
For the other species, 80 degrees and 3 ppm salt will probably be the max
they will tolerate.
Be sure to carefully examine all survivors for Ich before reintroducing them
to the system.
As Ron mentioned, formalin and copper sulfate are alternative treatments but
are pretty harsh chemicals. Salt and heat is a tried and true ich treatment and
is effective.
As for prevention, I recommend raising your water temps to at least 78-80.
The tilapia will be much happier, although this points out one of the
difficulties in mixing warm and cold water species. The other species may become
stressed at higher temps. Also quarantine all fish for 2 weeks before adding
them to an established system. I add salt during the quarantine period.
Good luck,
Gordon
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Subject: Re: Plastic Alternatives
From: "Sam Levy"
Date: Wed, 14 Apr 1999 07:53:29 PDT
Mike--
I'm not sure how salty you mean but--based on advice for a
mariculture facility, I would stay away from aluminum. Plastic
liners over cinder block can be a serviceable way to go (I've seen
filter beds made this way when they did not have to be raised). In
plastics I personally like polyethylene (either high density or very
low density) u v stabilized. It may look a bit like elephant skin
when laid down but it holds up better than pvc. The downside is that
it is much harder to patch (compared to pvc) and you may need
airlifts to prevent dead areas "south" of some of the folds (I'm
assuming that the channel will have aeration). I used this material
for outdoor fishponds w/no problems but a channel for a raft system
will behave somewhat differently.
Sam
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Subject: Re: Fish killing methods etc.
From: "Sam Levy"
Date: Wed, 14 Apr 1999 08:07:34 PDT
Mike-
In Israel, fish that are sold fresh & chilled are generally killed by
dropping them into a water & ice slurry. The cold shock kills them
and the core temperature is lowered fairly rapidly.
As far as I know, there is not a prescribed ritual for the slaughter
of fish as there is for cattle, sheep, &c. There are various aquatic
creatures which are proscribed by the laws of kashrut--decapods,
cephalopods, gastropods, & scale-less fish are all non-kosher by
definition.
Sam
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Subject: Re: Tilapia Feed
From: Gordon Watkins
Date: Wed, 14 Apr 1999 10:32:50 -0500
Here is some information on Red Wigglers (Eisenia foetida).
Gordon Watkins
Chemical composition of E.foetida meal
Wet Basis (%)
Protein (N x 6,25) 66,8 +-
3,2
Lipids (As EE) 8,8
+- 0,9
Humidity
7,3 +- 0,7
Ashes
8,4 +- 0,6
Crude fiber
1,3 +- 0,8
Carbohidrates 1,2
+- 0,2
Non proteic nitrogen 5,7
+- 0,4
Other constituents 0,5
+- 0,3
Aminoacidic content and composition of E.foetida meal
Aminoacid Gr. o aminoacid per 100 gr of
protein
+ Lisyne 12,51
Histidine 2,51
Arginine 7,03
+ Tryptophane 0,29
Asparctic acid 11,01
+ Treonine 3,76
Serine 3,30
Glutamic acid 13,57
Proline 4,47
Glicine 5,22
Alanine 5,54
Cisteine 4,23
+ Valine 6,14
+ Metionine 1,53
+ Isoleucine 4,73
+ Leucine 7,39
Tirosine 3,23
+ Phenilalanine 3,54
(+) Human essential aacids
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Subject: Re: Permaculture list
From: S & S Aqua Farm
Date: Wed, 14 Apr 1999 12:56:01 -0500
At 09:45 PM 4/13/99 -0600, you wrote:
>Uwe:
>
>Can you give me the address to get on that list?
>
>Thanks,
>
>Jose
send email to:
listproc@listserv.oit.unc.edu
Leave the Subject: line blank.
In the body of the message, type, if you're subscribing:
subscribe permaculture
if any problems, contact:
"Lawrence F. London, Jr."
Paula
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Subject: Re: Permaculture list
From: Jose Pelleya
Date: Wed, 14 Apr 1999 13:54:24 -0600
Thanks, Paula.
Jose
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Subject: Re: Permaculture list
From: "Uwe Bruenjes"
Date: Wed, 14 Apr 99 11:26:08 PDT
Hi Jose,
hopefully soon! What happened is that I subscribed before my last compute=
r breakdown, and lost the instructions (among other things). But I was =
able to reply to a message, and already asked.
Uwe
----------
> Uwe:
>
> Can you give me the address to get on that list?
>
> Thanks,
>
> Jose
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Subject: Re: Growing Beds
From: Craig & Robin Prince
Date: Wed, 14 Apr 1999 18:03:14 -0700
Thanks Doug - Jim - Paula
You guys & gals are such a great help- I will try to keep simple questions to a
minimum now that I have your Info packet (Paula) But just hang on; in a week or
so I'm sure I'll have more of the not so simply. ( No GE though )
Thanks again
Craig
* "" All Is simple to the one who knows ""
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Subject: Re: Aquatic microbiology again. Was: redclaw identification
From: "William Brown"
Date: Wed, 14 Apr 1999 11:00:31 -0000
Keep in mind the bureacracy here is very narrow minded, if there is or can
be E. coli contamination then powers that be will refuse to certify your
processed vegetable crop, in this case a salad mix. This does not apply to
manure grown and unprocessed vegetables such are found in the refrigerator
at the organic store which we will supposedly (but often don't) wash. The
whole world is turning to irradiation for sanitizing. We here in the
backwoods of Hawaii are in the process of building an irradiator to kill
bugs on exports and eventually to sanitize salad mix.
William Brown mahiwai@cmpmail.com
(aka lettuce@hilo.net)
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Subject: Re: Cover
From: "William Brown"
Date: Wed, 14 Apr 1999 10:50:59 -0000
We like 30% black shade here in Hawaii for general growing. 80% for
anthuriums. 30% of better for growing orchids. This is in the sunny
periods, in the winter most shade comes off except for the anthuriums.
William Brown mahiwai@cmpmail.com
(aka lettuce@hilo.net)
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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