My 11 gallon nano tank as of today. All zoas started at 6 heads or less and that GSP was around the size of a quarter. One of my bubbles split within 24 hours after adding it to the tank a couple months back and I have a really cool mini maxi hiding in the middle of the tank. Never test this little system and it gets a 10% water change weekly but I did start dosing trace A and K twice a week to help the LPs in the tank.