Tropic Seas Spa Foaming with Ozonator on

[opielab]

Hi all.

I just changed the water in my Tropic Seas spa (375 gallon, 6 seater) and when I turn the ozonator on, the water foams up.  I am using a Nature2 spa stick and bromine along with Cense.  I havent always had this foaming issue.  I cleaned the spa after draining it.  Filled it as I always have, test strips indicate everything in the recommended ranges.  Any idea on this?  Would love to be able to use the ozonator without this foam.  I know some bubbles are expected because its air blowing through the water, but it foams up.  Once the ozonator is off, it does disappear relatively quickly.  Any help or thoughts would be helpful.

Thanks!