Totally agree with Mike.......but with perfect water conditions, it should be doing fine......I would recommend testing you water again, or try a differnent test kit....I have never seen 0 nitrates.......that would kinda trigger me to think it may be the test kit.......

BTW......that stuff coming off is called "brown jelly".....you can TRY to save it by syphoning(sp?) it off.......

JTrott