So I just got a pack of 3x 2" Azul's. They have amzing marking for being this small, I currently have them in a 55 Gallon by themselves ( Stole my flowerhorns Home) . So with that being said , I need to buy a growing tank for them before I put them in the 220 G. What's the best size tank I should go for or should I say, whats the smallest tank I could put them in for grow out. Thank you