The tank is 7'
How long can you keep that many in a 210G?
Not long, its pretty cramped for them they need more length for a cert and more width to space out from each other, aggression from the pinima is pretty high so im now considering whether i should get rid of him to allow me more time to get the larger tank as i believe the waiting time is 10 weeks and we need to decide on a size for it still