04-08-2013, 04:30 PM
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actually we are all correct.
It does provide a high oxygen environment for aerobic bacteria which does reduce ammonia and nitrItes to nitrates.
And is also acts as an algae turf scrubber growing algae which consume ammonia and nitrates as well as carbon dioxide (from the air and water) returning oxygen and producing algaeor even cyano.
so when the wheel is turning and full of the uckie green stuff nitrates are being consumes. and if present ammonia directly as well. Locally, several people report 0 nitrates with bio wheels.
Cleaning the wheel actually degrades that perfromance.