So I started a 39 gallon and after cycling it, I put in 3 Emerald Brochis. I'm trying to decide if I should get more. I know 3 is a small shoal but they do get large so 3x 3" fish is a lot but 6 may take up too much off the footprint when there all trying to settle after swimming together. What do you guys think? Should I maybe add more to get 4-5 or just keep it at 3?