Aquaponics Digest - Sun 09/12/99
Message 1: E Coi
from Marc & Marcy
Message 2: Re: Need off grid advice
from "Jewel Lopez"
Message 3: Re: Need off grid advice
from "Jewel Lopez"
Message 4: Re: Need off grid advice
from "Jewel Lopez"
Message 5: Re: Need off grid advice
from "Jewel Lopez"
Message 6: ozone generators
from "JAY MYERS"
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| Message 1 |
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Subject: E Coi
From: Marc & Marcy
Date: Sun, 12 Sep 1999 09:37:16 -0600
This link seems relevant considering the thread on
sterilization earlier.
http://abcnews.go.com/sections/us/DailyNews/ecoli990911.html
Marc
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| Message 2 |
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Subject: Re: Need off grid advice
From: "Jewel Lopez"
Date: Sun, 12 Sep 1999 12:57:29 -0600
Hi Barry (and the rest of the list),
And thanks to all of you who have been so kind as to reply with suggestions
and ideas.
>
> This sounds like a great project - any pictures available? How many
> terraces/greenhouses do you have?
No pictures yet, just finished the excavation - we'll post some later.
There will be 3 greenhouses, 3300 sq ft each approx. Although we are
focusing on getting just one finished and operational by winter. 2 or 3
terraces per greenhouse.
>
>
> A couple of questions:
> Do you use any reflectors for when then sun is at a low angle or does
> the amount of light through the rest of the day make this unecessary?
We don't know yet, but because we are in the highest solar energy zone of
the US, we have been warned too much light or burning may be more of an
issue than too little.
>
> Does the altitude/pressure have any other effects on plants?
>
I've never heard anything about pressure, but the altitude increases the
solar radiation.
> This sounds like a fairly technical setup - why do you want to pump
> it manually every day?
>
We'd like to be as simple and sustainable as possible, plus be prepared for
total photovoltaic system failure. Also, the PV system is looking like it
may cost far more than originally thought, because of how high drain the
pumps are.
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| Message 3 |
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Subject: Re: Need off grid advice
From: "Jewel Lopez"
Date: Sun, 12 Sep 1999 13:10:58 -0600
Hi William,
, the drippers nearest the
> gravity stock tank received more nutrient than the ones farthest away
during
> active dripping. When the tank ran dry, the drippers farthest away
received
> more nutrient than the drippers closest to the tank. End result, farthest
> drippers actually ended up with most the nutrient, nearest drippers had
more
> than the ones in the middle. Since I was using line pots to hold the
> nutrient this became a problem.
What is a line pot?
If I had used media and a run to waste
> setup it would be less of a problem but wasteful as the name implies. 12V
> pump and battery with either a solar or electric charger are in my future
> inspite of the higher initial cost.
Tom at S&S has had problems with 12 v pumps. I wish I could find reliable
ones. I heard of a good one, it was a swimming pool pump, but it was bronze
and would've been toxic to the fish.
Never did have more trouble with
> clogged emitters using gravity feed over pressured feed. Both
occassionaly
> had clogged emitters because of the salts drying out. Best to flush with
> fresh water after running nutrient solution.
Are you in Hawaii William? which island?
thanks
>
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| Message 4 |
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Subject: Re: Need off grid advice
From: "Jewel Lopez"
Date: Sun, 12 Sep 1999 13:13:15 -0600
> ----- Original Message -----
> From: Adriana Gutierrez & Dennis LaGatta
> To:
> Sent: Wednesday, September 08, 1999 3:08 AM
> Subject: Re: Need off grid advice
>
>
> > Hi Jewel,
Hi Adriana,
> >
> > How big is your greenhouse going to be?
33x100 (three of them)
I've looked into gravity drip
> > options in a Y2K worst-case scenario. There is not a lot of literature
> > on it but an older book on hydroponics referenced a professor at Cornell
> > that set up a gravity drip system with an electric pump refilling the
> > tank from a sump. The second reference for gravity systems is from
> > Chapin Watermatics, which makes drip irrigation supplies.
> >
> > One concern I came across was the possibility of plugging your drippers
> > because gravity does not provide sufficient pressure in the lines.
I think it would depend on the water pressure, dependent on the "head" (how
high the gravity feeding source is above where it's going). You should be
able to duplicate pump pressure levels with enough head.
> >
> > As to manual pumping to refill the main tank, unless it is a fairly
> > small operation it probably is not practical except in an extreme
> > back-up situation because you'll be moving an awful lot of water. My 20
> > 4'x14' growing beds (drip system) use 80 gallons per hour. That
> > requires two very large tanks and a lot of manual pumping if you want to
> > only replenish your upper tank once a day.
> >
> > I would check out the solar pumps in Teds posting of last week or touch
> > base with Marc Nasmeth from the group who is putting together a
> > prototype system.
thanks, I will
Once you cross the line to using a powered pump you
> > might as well put the pump at the supply end to avoid plugging problems
> > and let gravity handle the return flows.
> >
> > One final concern if you have fish in your system is how to oxygenate
> > your fish tanks.
true. Have to think on that one.
> >
> > Adriana
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| Message 5 |
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Subject: Re: Need off grid advice
From: "Jewel Lopez"
Date: Sun, 12 Sep 1999 15:44:38 -0600
Hi Mike, that pump sounds very interesting. Is there anywhere I can get
more
detailed info? Greenhouse sizes are about 33 x 100.
thanks, greg
thanks
jewel
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| Message 6 |
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Subject: ozone generators
From: "JAY MYERS"
Date: Sun, 12 Sep 1999 22:43:29 -0500
In the past someone offered assistance with plans to build a ozone generator
to help with fish DO.
If still available please let me know how I can contact you.
Thanks very much.
Jay Myers
aerialads@panamacity.com
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