I am new to this but I have friends with hot tubs that have next to no issues with water chemistry. Despite advice from them and the vendor (who have been really helpful actually) I just can't get rid of the foaming problem. I can have crystal clear water with balanced bromine, alkalinity and pH and no hot tub use for several days and the foam reappears every time. Everything I read indicates it is something we are introducing to the tub and I get that principle and don't deny it. I just don't know what could still be causing it despite balanced chemicals, shocking after heavy use, showering before etc. Anti foam works short term but does not fix the issue.
I've attached a video. This was after 3 days of non use. Btw, I already refilled the tub a few weeks ago. The water in this part of Ireland is soft so unavoidable for all tub owners here.
Any suggestions would be appreciated 🙂