Looking for some help with excessive foam on my hot tub, thanks in advance
Marquis 390 gallon hot tub. Outdoor, new england, always covered except when in use.
We are having excessive foam with air venturis open, no problem when jets on / venturis closed.
tested water, changed water, added CC to get CH up to 150, tested water, complete water change again!
Still foaming, and it never used to foam like this. I suspected a kid foam prank, but with the two water changes and the foam level did not get any better or worse, I can't really figure this one out. I am used to the foam gradually increasing over time due to small amounts of detergent in bathing suits, but this is a large amount of foam, from day 1 of the water change to day 30.
My well has a softener to remove iron and manganese.
I never had to increase the CH of the hot tub in the past to stop foam, but decided to try it this time, to no avail. I added CC to get the CH up to 150 the last two water changes, both which were done in the past month in order to try to stop the foam issue.
Here are the current numbers:
CYA 0-10 - I added 2 tbs of Dichlor so far to this water change, starting 2 days ago. Not much CYA yet.
I normally use Great Value (Walmart) concentrated bleach (around 8.25%) and only need to use some bleach and do a very small amount of pH balancing over the 2-3 months that the water stays in the tub until the next water change. I have not had to add anything else to the tub in 2 years of using this method until the foam showed up 2 months ago. At that point I tried increasing the CH and then changing the water. Still foaming...
Any ideas much appreciated!!