Hope you aren't attached to those tankmates...he still has a lot of growing to do. and in case you happened to miss this:
http://www.monsterfishkeepers.com/forums/showthread.php?t=165084
No matter how long they have been together, something can happen at any second. In your case, its most likely you'll lose the gar's tankmates since he is going to grow a lot more and they are pretty much full grown. Taking what happened to Miguel's CK and what my pacu did to my gar, I would say you have a bad combination going.
http://www.monsterfishkeepers.com/forums/showthread.php?t=165084
No matter how long they have been together, something can happen at any second. In your case, its most likely you'll lose the gar's tankmates since he is going to grow a lot more and they are pretty much full grown. Taking what happened to Miguel's CK and what my pacu did to my gar, I would say you have a bad combination going.