I had a 120 gallon planted Tanganyikan tank. Unfortunately, the house sitter didn't notice that the filter clogged when I was out of town and I lost all the fish. (Except for the Synodontis petricola, oddly enough) Here's some bad pictures of the tank now:I don't know much about firemouths, but I'm hoping to do something similiar with tanganyikans. What lights are you planning on using? Substrate?