When ppl are talking about grow out tank pr grow him out. What do they mean? Dont hate me but i see this termed used around here alot. But does this mean put a fish in a tank by itself do alot of water changes Thus releasing its jell or whatever cimical u call it that tells it how much room it has to grow. I did i just make that up? I dont think i did cuz its used in the koi world.