03-24-2007, 11:33 AM
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yes and no, bio-balls create nitrates since all the waste is filtered out mechanically in the bio-balls. If left unnoticed they will become a nitrate factory and continually produce nitrates, even if the fish-load is small. The best way to go with this is to clean them like you said but try not to clean all at once. Maybe clean 1/3-1/2 a month by placing it in a bucket of old tank water and slowly stir them around, then put them back where all the other ones and make note of where you put them, the next month clean the ones you didnt clean and go like that. As CRM said in another post, bio-balls dont create nitrate, its being neglectful of the bio-balls that create nitrate.