I've been interested in these guys for a while and I saw a local distributor has some IT'S listed so I'm thinking now maybe the time. 72x30x25 tank with 4 cl, 3 SD, 2 hoplarchus psittacus, 2 severum, 1 paratilapia polleni and 1 bellycrawler. I'm thinking 1 or 2 is all I can fit but not sure. Aso is there a quantity that should be avoided(like 3 angelfish is almost always bad)? If you were in my shoes how many would you pick up?