I just found a solution to a many months long struggle with a) cloudy water and b) green water. In brief, I have tried all the usual remedies - addressing bacterial bloom, too much light, water source, etc. Most recently I have been buying bottled water and that sort of got the cloudyness down but then I developed greenish-cloudy water. I tried changing 20% of the water over several days. I took risks and cleaned out everything. And on and on. Then this week while in my local pet store I saw a small bottle of something called "Crystal Clear." It only cost $2.99. What the heck, I tried it. Put eight drops in one day. Next day no change. Put in another eight drops and went about my business, figuring it wouldn't matter if I prayed, offered sacrifices, or painted the glass a different color. Then on my way to the kitchen I saw it. Or should I say I didn't see it. The water was absolutely crystal clear (hence the name I guess). I don't work for this company, I don't know anything about them other than what's on the bottle. It reads: Crystal Clear. AP (Aquarium Products). Glen Burnie, Md 21061. I'm going to write to them and offer congratulations and thanks.