can you show me a pic so as i can know what you are talking about? i own a mag 350,casscade 1500,and a tetra 150 so how would i clean them?WyldFya;1001285; said:I rinse the foam and filter floss, in sink water, because it doesn't house much BB. The ehfi mech, and ehfisubstrat pro, gets rinsed in tank water.