I have a 16'x48" Intex with an Intex SWG. My CYA is now sitting at 70, however, my SWG cannot keep it at proper levels on it's own. Does anyone maintain their chlorine level using their SWG alone (similar setup to mine) or are you adding bleach/chlorine as well? I run my SWG at night per my manual, 2 hours. Pump runs 30 minutes prior and 90 minutes after it shuts down.

Also, what is this white build-up on my SWG? I cleaned it several weeks ago using vinegar and now it appears to be worse than prior to cleaning. See picture.