i'm planning to add a couple of gt's with my bichirs ranging from 9 to 12 inches. is it a good idea? the gt's are both males and are 4 to 5 inches in length.
How many GT's exactly? If it is 2 I think so but it still depends on tank size and the fact that every fish has its own personality. You could get lucky & get a really nice GT like mine who has never had an aggression problem or be unlucky & get a insane killing machine...
I've tried keeping cichlids with bichirs a few brief occasions, and though they never really damaged the bichirs, I was always really worried about their general displeasure and nipping toward them (Though these were JD's and firemouths).