oh i love those, asides from the fact they get huge and chomp everything(including your fingers) in half...it's just a bad idea to have so many different kinds of potentially huge preds in a tank you havent got yet, cycling takes time too, if you're going for gars, id suggest you stick to gar-friendly tankmates such as bichirs, african arowanas, other gars maybe arowana(i've found this works more than it doesn't). big cats, pacus(generally) snakeheads and aggressive cichlids generally dont do well as gar tankmates.