tony - i havent tested nitrate in about a month or so but when i do it is pretty much undetectable. i run no zeo systems or additives. i only run rowaphos in a reactor. in the main dispay i have about 180 - 200 lbs of rock and about 50lbs in the sump. i do weekly water changes and i syphon 1/3 of the sandbed each time. i have thought lately about the fish load and nitrate issue but everything gets along extremely well, corals are rocking and water clarity is great so i havent stressed too much about it.
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