Here is the article I found on the bioball nitrate factory myth.
http://saltaquarium.about.com/od/saltwaterfishdiseases/tp/topaquariummyths.htm
" 8. Bio-Balls are nitrate factories.
MYTH: Bio-Balls or wet/dry filters create nitrates in a saltwater aquarium.
FACT: Bio-Balls and wet/dry filter material can trap detritus and other tank debris which break down and eventually create nitrates. If the Bio-Balls are cleaned regularly, they don't create any more nitrates than a substrate with the same materials in it."
http://saltaquarium.about.com/od/saltwaterfishdiseases/tp/topaquariummyths.htm
" 8. Bio-Balls are nitrate factories.
MYTH: Bio-Balls or wet/dry filters create nitrates in a saltwater aquarium.
FACT: Bio-Balls and wet/dry filter material can trap detritus and other tank debris which break down and eventually create nitrates. If the Bio-Balls are cleaned regularly, they don't create any more nitrates than a substrate with the same materials in it."




