i dont quite understand what u mean by get more mech. and when u say rinse, u mean rinse my biowheels? thnx in advnaced.
also you can get mech/filter floss(100% poly batting) cheap if you go to a craft/fabric store and by it be the yard or roll... if you have to clean your bio wheels use tank water, I have never cleaned mine.
and carbon is only good to remove meds