Thanks, WM. They can't hurt and might help. One correction: the scum bug/scum ball sits in the SKIMMER, not the filter. My error.
Thanks, WM. They can't hurt and might help. One correction: the scum bug/scum ball sits in the SKIMMER, not the filter. My error.
Oval 12.5K gal AGP; Hayward 19" sand filter; Pentair Dyn 1 HP 2sp pump on timer
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