Why am I getting foam with air jets on?


Jul 30, 2016
Mounds View, MN
I refilled about 6 weeks ago and have been using the bromine system. I recently added boric acid to appx 40ppm. I switched in brand new filters 2 weeks ago.

My pH kept rising which is why I tried the boric acid, and it's actually been stable since.

My pH is 7.6, bromine at 2-3ppm, 50 Alkalinity, calcium ~225.

The water looks perfect, but when I turn on the Air Control Valves (adds air to jets), bubbles start forming and combining into foam.

Does the boric acid possibly cause foaming? Or any other ideas? For now, I'm just keeping air off and it's all good...



In The Industry
Mar 21, 2020
Cabool, Mo
I guess it could be something in the filters, though I have never encountered anything like that personally.
Usually foam is the result of detergent/ fabric softener residue, hair products, etc. Any chance of that?


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TFP Guide
Jul 3, 2013
Fletcher, OK