I've added in 3 giant danios for now as the guy at my lfs said larger schooling fish are usually good in 3 and smaller fish need to be in groups of 6. Anyways, they're really really active but they haven't seemed to make a difference to the jds. Only for the first 20 mins of the danios being in there, the jd's were interested but they just been in their hiding spots after that. My jd's seem like some nocturnal fish, at night I turn all the lights off and watch them with a flashlight and they're really active the male actually tried to chase the danios last night lol