You have him in 2" of water? How big is he now? Are your turtles small? I have my FB's pond 3" deep. The sucker fish grows slow enough that you do have time. I have rainbow sharks and I'm watching them, too. Had an albino rainbow that grew to 3.5" in about 2 mos so he was donated. He was in charge of the whole tank because he was the biggest fish and he kept bothering the tank mates. The remaining fish are so relieved they had to lay down in the plants LOL. Well, first they partied...