My one jandy valve splits the skimmer & drain line, so I assume if one is Off then the other has more power/suction? If yes, when we brush we are after the debris getting to the filter- is this better acheived by the drain? So turning the skimmer off while brushing ( and maybe 5-10 min afterwards) is a bit better or makes no difference? I think of the skimmer as as surface region cleaner.
Thanks
Thanks