You might want to try this. Reduces nitrates like a dream. However it doesn't cure the problem (if indeed you do have one). But better than a billion water changes (while good for the tank, not so good for the back)
http://oceanaquatics.com/store/produ...traLife-100ml/
Takes about 24 hours to reduce nitrates and phosphates. Clouds up the water for a bit (its clay-ish) but then clears. Pretty neat product
