Originally posted by LeahMM
Correct me If I'm wrong but they only grow as big as they're surroundings. I had one in an 80 gallon tank that was about a foot and a half long yet the one I have now is in a 30 gallon tank and is only about 3" long. We've had it about 5 years.
That is what I have read too. But you do have to be careful as they are like goldfish in a way, they grow to their surroundings BUT sometimes they still get too big, especially if you have multiples &/or they are in a tiny tank.