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I have a problem with the bromine level going very high when shocking with MPS and more recently I have had to adjust alkalinity and PH more often than usual. Had quite a bit of foam after I last shocked it and run it with the jets on and cover open. I also noticed that the ozonator bubbles seem like they are smaller now. I'm sure they were bigger 3 months ago. I have had itchy dry skin on my legs recently as well.