how many and what kind of cichlids in the 55 gallon? There are 1000's of cichlids, some are as peacefull as a Ram, or some can be huge and aggressive like a black nastey, Nandopsis haitiensis. So your experiance in the last has nothing to do withthe cichlids now, except if they were the same kind. And in the 55 how long did they live, and any unexplained deaths?