I have a 55 gallon tank, a 10 gallon, a 5, and a one and a half. I have had the same fish for about a year, and I'm ready for a change. The 10 gal. has a cherry barb and a Zebra Danio, the 5 and 1 1/2 aren't in use, and the 55 has 2 electric yellow cichlids, a pleco, 2 tinfoil barbs, and 2...