I have a few questions regarding Cellulose fiber replacement in a DE filter.
I have a Pentair FNS+ 60 DE filter in which I'm using a Cellulose fiber replacement. Every 3 or so weeks my filter pressure runs high and backwashing becomes futile. As time goes on, backwashing seems to remove less and less while the Cellulose fiber becomes clumped and attached to the grids. I've read a lot of the posts on this forum but I wanted to double check, is the recommended solution to this problem just to do a full clean of the filter and recharge it fully? Is there no known way to prevent the cellulose fiber from clumping in the filter? Finally, how often should someone have to backwash or, in this case, perform a full clean?