yea if they are too small they could get eaten by the bichirs and things thats swim kinda twichy seem to attract bichir but if the tank is big and u got some floating plants i think u should be fine but watch out if the bichirs start to stalk the gars in the floating plants as i noticed my delhezi doing that to my giant danios which eventualy dissappered but the danios where around 4"-5" and the del is around 12"-14"....... if u get the right sized fish u will be fine.......