Thanks for telling everyone my secrets Mitch! lol
I do monthy water changes also to replenish the tank with trace elements. The sock thing is for a weekly cleaning of debris gathering up on the bottom of my "purdy" BB set up. I also syphon the rocks off instead of just blowing it into the water colum which imo has no value. Its all still going to end up in the filter pads and not solve anything. My way, by syphoning it into a sock in the sump, i can actually remove it from the tank with out clouding up my water a turkey bastor.