I have a single Gold P. growing out in a 29gal. He's not even a full inch yet. Two questions: How big should I let him get in the current tank and what size tank would be my end game for him. Just the single fish. I keep my tanks well maintained with good sized weekly water changes. I guess what I'm getting at is what is the smallest tank I can look for. I was told a 40 breeder would work but I want more feedback on that. Thanks in advance.