so I have a couple pbass which are 8-10" and a arowana that's 12-13" those are rough guess's as anytime I get near with a tape they bash into stuff and get freaked out like crazy.... but anyway I have a chance to get a 18-19" florida gar which lives with a big arowana at the moment, now could I add the gar into my tank without having trouble or am I asking for trouble if I decide to add him ? he eats pellets feeders shrimp[ and pretty much anything