I have a 12 gallon Eclipse system that is going to be my next project. I plan on doing making a pile of rocks in the back with lots of ledges to place some shells. The substrate will be sand and I will be keeping the pH around 8.5 and the temperature at 80 degrees. I plan on making it a biotope for neolamprologus multifasciatus. My questions are; how many of these fish could I keep, and what should my ratio of males to females be since I would like to breed them, also is there any bottom feeder that is compatible with the fish and water paremeters. I looked at possibly some petricola synodontis but they ar eto big for the 12 gallon. Any help is greatly appreciated.