BIO-Wheel® Assemblies - Various Models is rated out of 5 by 1.
Rated 5 out of 5
by Sneaky Pete
from Dropping Ammonia Levels I bought one as a replacement for my Emperor 400 and one as a spare as I purchased the 400 slightly used but not abused from a marine application. Unfortunately, replacing the bearings did not help as the axles (fiberglass) were too worn on one of the wheels. These Bio-Wheels are not the be all and end all for removing and/or neutralizing ammonia, but they do a pretty good job. However, I do not recommend replacing the wheels unless they are no longer functional.
Date published: 2017-11-13