k, i just got 2 zebra starfires, and a load of water from the tank of the lfs to help the cycle. they seem to be pretty happy they move A LOT or maybe because the current of my tank is strong since i have two filters. i dont know, but they arent eating the flakes i drop them.zebra danios might be ok for cycling if you're gonna use a fish, but they will definitely not be happy. they'll be cramped in a 10 gal.