So I want to keep a pair of nics. I was originally thinking to house them in a 55 but now im aiming for a 75 or 90 gallon tank(I don't think it will matter much which one I get they both have the same footprint). Anyway, I know that nics are a "fairly docile" CA so I was wondering what I could keep a pair with. I already have sailfin mollies and 4 flier cichlids(trying to find a pair) and i was wondering if 75 is too small for both pairs. I love the fliers but I have my heart set on the nics.