I have kept many fish over my 30+ years and now that I have my 350 gallon up for my Central/South American, I'm going to turn my 75 into a Lake Tanganyika setup. I'm looking for some ideals and would really like a species only tank or only a couple that will co-habit the 75 gallon tank. Please provide me with some species that would fit this bill if possible. I've been doing some research of course and i'm going to order some on Thursday this week and just want to ensure I have the right species to get. Neolamrologus Tetracanthus is one i've looked at as well as Neolamprologus leleupi. Thanks ahead of time for the help.