I have been toying with the idea of getting a couple of clown loaches. My LFS has some that are very small, maybe 1 1/2 inches. I have a 37 gallon and this would eventually probably be too small for them but I think my LFS will trade me if that happens. Anyway, how fast do they grow and would 2 be happy enough or 3 be better. Actually I know 3 would be better but would a pair be happy enough? I am trying not to be too crowded, either.