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The pond I'm building with the bottom drain I asked you folks about....
We've decided to go a bit further down. We're hoping we can go 9 feet deep at the bottom drain, with the benching bring us to about 8 ft at the walls. Is it possible to go too deep?
Also, based on your advice, I'm going to have the 3800 gph pump on the bottom drain circuit. My settlement chamber has approx 6 min. of dwell time, but I'm curious what I should be shooting for on my bio filters. I've got two 100 gals containers that I'm using. Water is going through settlement, then through pump and up into #1, then gravity feeding into tank 2 then gravity back to pond. My pump is going to be moving about 55 GPM I figure with friction/elevation loss so I was thinking I would re-direct some of the water after the pump back to the pond and try and shoot for about 20 GPM into the filters to get 5 min of dwell time. Is it quite important?
Thanks,
Grant |