well im a bit partial but BGK's are the best if you get 2 off them in a large enof tank no matter there temperment theyll get more or less along but i can't agree that with the neon tetras my sister but normal tetras in there about 3 times the neons size and they got eaten quick BKG's love the chase and will chase till the fish is stressed enof it dies or they catch um=p don't underesamate them there beautyfull but you got keep fish fastenof to get away or agressive enof to punk the BKG out my beta does it dailly =p. if you get 2 get a fish that they can see as a coman threat thats what i did they just double teamed him and now there just like brother and sisters just bicker alot