Well here is the scoop. It's been almost a week, and believe it or not, I haven't had a single tilapia fatality. Lol. I have nile, Mozambique, and blue tilapia together. The only fish that were having a tough time was the Mozambique. But with a few minor changes and plumbing to make the water more turbulent when returned to the fish, I think I gained some oxygen. However my system does need evolved more. It's been changed around more times in the past two years than I've changed clothes.. Ehh I'm just kidding. But, on a serious note.. It would be nice to convert to a sand filter, and get rid of that behemoth of a bio filter; the one with the bio balls that get all gummed up.. But, I have a question. I have oodles of hydroton that I bought a while back, that could fill a 55 gallon drum. I was thinking about making my own gravel/ sand filter out of poly 55gal drum; for I have an abundance of those as well. Should I, have two in sync with each other, the first being filled with hydroton, then the second filled with sand? Or fill half and half of each? I could be getting into a quandary doing this, for Rainman said that sand filters are touchy when it comes to flow rates through them.
