Can you have TOO MUCH Fish Fetal matter in you lower tank to pump to your flood and drain grow bed ?? Suppose you did not have to worry about the fish ,in the tank and the effect on them?? This is a serious question ,I am asking because I back Back flush my mechanical Sand and Gravel filter on my pond and expell that liquid to other uses out side the pond ,and I do it every week 50 -75 gals .just suppose it went to the bottom tank w/o fish and was pumped up to a flood and drain system in upper grow beds.with worms and recharged every week ,excess over flows for other growing uses.
Your opinions and comments requested !! Thanks Carl