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Re: FRY FLOW-THROUGH RATES
First I'd be interested in hearing of the valves that you found. Please provide me with a reference or a web URL.
Second, I think 2 gals an hour is plenty of flow. I have a flow through fry system as well as flow through systems on each of my racks of tanks. I have used a variety of valves, but all give a similar flow rate. The valves I prefer are the small black ones that you can buy from Jehmco. They are a ball type valve with a stem that turns. In the stem there is a hole through which the water flows. The degree to which that hole is open controls the flow.
My fry boxes are the Sterilite shoe boxes that hold about a gallon. I have water flowing into them at what I would describe as a fast drip. The water overflows through a bulkhead fitting with an elbow at one end. It then flows through a drain system to a spray bar that allows it to drip over larva rock then back into the reservoir, which is a 50 gal drum. This system allows biological filtratioin and good oxygenation and is a modification of the deBruyn filter system. My tanks are set up similarly, but I use a somewhat faster flow rate. I still have box filters in the tanks to help clean the debris out of the water.
I look forward to hearing about your valves.
At 07:42 AM 12/18/2001 -0800, you wrote:
>Anyone have a suggestion on flow rate [GPH] or turnover rate for the fry
>flow-through systems that have been talked about here recently and which was
>the subject of a talk at the last Convention?
>I am considering building such a system and ran across plastic,
>micro-control valves that state 2 GPH max. This doesn't sound like enough
>flow, but no pressure was stated for this 2 GPH rate either. Come to think
>of it, I could use some suggestions on very small water control valves for
>this type of setup. I am thinking of using 5-8G pan-type containers.
>Thanks for any suggestions.
>See http://www.aka.org/AKA/subkillietalk.html to unsubscribe
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Barry J. Cooper, Prof., Dept. Biomedical Sciences, Cornell University
Current address: 27505 Riggs Hill Rd.
Sweet Home, OR 97386 (bjc3 at cornell_edu)
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