Can you keep multiple GSP in same tank? I have a 120 gallon that I'd use, and I know they have to switched over to full salt as they mature, but I'm wondering will they end up killing each other? I used to have 6 of them in a 40 gallon like 12 years ago, I loved the lil guys till my tank broke. Plus I had no clue on keeping them back then or any fish for that matter. They were small though like 1-2 inches any way can they be their own community tank?