boardsurfer
Aquarium Advice FINatic
I have a Penguin 330 dual bio-wheel filter on the back of my 55gal. I removed the dual bio-wheels about a year ago because I read somewhere that it is a nitrogen-harvesting factory.
Is this true, or do the biowheels do denitrification? Is it better to have the biowheels in or out?
TIA
Is this true, or do the biowheels do denitrification? Is it better to have the biowheels in or out?
TIA