I may get a 29 gallon tank, if I do I think I will move my fish in my current 29 to that (it's a biocube, 19x19x19) tank and the tanganyika cichlids to the biocube, would I be able to get some shell dwellers with some julidochromis dickfeldi or would they fight with eachother because they aren't the same species? Note, I want to use the biocube because it has a sump in it for a heater so it would look better and I am also new to cichlids, I was thinking have argonite as the substrate with some rocks and fake plants in there with a bunch of shells, I'm just worried that a group of shell dwellers in that small of a tank would fight (I was looking at 6) and that having a different species (also 6 julidochromis) would be an issue too