I'm going to offer an alternative perspective to RD (I'm not disagreeing with what he said though, because it is sound advice) and that is that unlike the vast majority of aquarium fish bigger CL's are almost never hard to find a home for, so if I were in your situation I'd get another 10-15 of them to grow out and then reduce the numbers as they grow. Based on my past experiences, they should hit 5-6" in under two years if cared for correctly, though there does seem to be a certain amount of natural variance with some individuals growing slower and [probably] never reaching the same ultimate size as others.