Mine is a 65 gallon planted tank. 6 platies are in the nursery. I saw 5 more in the tank - there was a 6th one a few days ago, but one of the balas ate it. There are 2 bala sharks, 4 platies, 4 mollies & 2 small plecos. The balas are the largest fish in the tank, but only 1 1/2 to 2 inches long. Actually, my sailfin molly may be about that size as well. Anyway, we caught as many fry as possible (they're really quick). Then I finally gave up and decided that the ones left in the tank were too quick to catch and maybe too quick for the other fish to catch. Now I'm concerned because I just came home and my black dalmation molly is dead for no apparent reason. Boy, that was depressing.