That's what I've heard how long did you put it in for? My lfs said they would give me already cycled water from one of there tanks the guy said he would do a water change for me then he said to put a fish in to help the cycle I told him that's to expensive to possibly lose the fish then he said do the cycle with snails or a crab or something then I said I wanna do a fish less cycle he advised against using chemicals. Seems like a good guy I asked if I'd need a power head or heater he said my hob should be fine so if he's not trying to sell me extra stuff and take my money he must be trying to help i would think