well, i think you are fighting the wrong thing here. What is the temp of the water in the bucket? It should be 75 or less. 68 is usually optimal but that is all a preference thing. Use frozen pop bottles or ice or whatever you can to chill the water. That is what i think is the problem. If the water is 70 and the room is 95 (which will suck because you will go through a lot of ice making) then everything will grow fine.

My best guess.