For the past few weeks, I've been setting up a 37 gallon tank with driftwood, a sand bottom, and fake plants, with a fluval aquaclear 70 filter, with purigen as the filter cartridge to tank any extra tanins out of the water. I've been deciding on what fish I should put in the tank, and recently I've found convict cichlids, specially either a male and female, or two females(I'm leaning towards a male and female), which I really love, but at the same time I've been trying to see if there's any other tankmates that I could possibly put with the convicts, knowing they get aggressive during breeding. At the moment, I would like to put 3 kuhli loaches in the tank, simply because they will keep the tank clean, and they're nocturnal so I know they won't get in the convicts way during the day time, but I've seen other people put rainbowfish with their convicts, considering they get a decent size. Would about 3 or 4 rainbow fish(all females) be good tankmates for a pair of convicts??? If not, what would be better?