i know i need to upgrade my tank size to house mbunas, and i'm looking for some advice. I live in an apartment, so space is limited. I'm still trying to figure out where to put a new tank/convince my wife, so i don't want to go too large. I would like a 90 or 120, but i don't think i can fit it. I want to keep at least 12 mbunas from lake malawi, including red zebras and mainganos. opinions are welcome. thanks!