I missed that part. Apologies. You have next to no need for skimming. Your filtering need is mostly the same as pollen dust and whatnot goes right through the screen.
No. Suggesting It was just another option at your disposal.
I think whatever happened when you tried it coincided with something else and led you to believe you had to run at high speeds. Again, the filtering needs change over the season so even if you do need it at times like in the spring, it's not all the time.
That said, if your way works, and it's free......
I filter too much also for most of the season, just in a different way with low and slow.
Did anything appear off about the salt ? We've seen some reports of a bad batch that we're more sand/dirt like than salt like. I just used Mortons the other day and made sure to stir up the bag first and make sure it looked salt-y.
Also, maybe it's time to raise the CYA and the salt is a smokescreen.