kraash
New member
I have them on all 4 of my sump returns, change them about every 4-5 days with extras that are clean and ready go. I then put the dirty socks in the washer on the hot wash cycle with a cup of bleach turned inside out. Then run one cycle with just cold water, and a third cycle with cold water and add a chlorine remover in the rinse cycle. They come out bright white and clean.