Right, if people were aiming to "disinfect" the filter socks, then I get it. But for all intense purposes, simply running it with water will accomplish 99% of what you wanted anyway. Unless youre OCD like Charlie and must have a whiter shade of white to the filter socks. I would also be wlling to bet that bleaching tehm shortens their lifespan also, by degrading what you dont want degraded.