Hi I am looking for some advice. I am setting up my new 240l tank and am considering a Tanganyika tank . The tank set up I believe I have all I need . My plan for the tanganyika would be one species of shell dweller a variety of rock dweller and one open water species . SD would be either Brevis or Similis, 1 male 2-4 females. Open water would be Leptosoma 8-10. The advice that old be useful is the rock dewellers what variety of species and in what male to female ratio. I keep reading conflicting advice. So any help would be appreciated. it seems the fish are hard to get