[danny zubot]

Well, the water changes aren't a factor. The green algae bloom as well as a brown algae bloom has all occured since I did a large water change after treating for cyano. the total change was about 45% over a couple of days so there shouldn't be any real No3 and waste problem. I did however stir up my sand bed a bit, causing either a ditritous fallout over my tank. Or I killed enough nitrifying bacteria to warrant having the bloom due to under nitrification. This is one of my therories, ther other is my photo period as mentioned. In the past 2 months I have gone from 180 watts of NO and Pc lighting to 380 watts of MH and Pc lighting. The MH bulb is new but the PC was purchased from a fellow reefer in Calgary and I was told that is was 4 months old at the time, 6 months old now.

I do have a lot of hermits, and cerith snails, and a couple of tourbon snails in my sump. I will consider and urchan, but will a tang eat hair algae? This is my real question.