MPS and Chlorine

[watsocl]

I occasionally shock my spa with MPS and I was wondering if doing that can throw off the free chlorine reading I get when testing?

 

[polyvue]

I occasionally shock my spa with MPS and I was wondering if doing that can throw off the free chlorine reading I get when testing?

Welcome to the forum...

This isn't really my area of expertise but I think the answer to your question depends on how much MPS was added and how long it's been in the water. Check out the two threads below; one covers how MPS works, the other touches more specifically on your issue.

how-does-mps-work-as-a-shock-t18181.html

effect-of-mps-on-cc-test-how-long-t18025.html

 

[duraleigh]

watsocl.

Welcome to the forum! :lol: :lol:

 

[watsocl]

Thanks for the welcome and the info!!

 

[PaulR]

I believe MPS does not affect FC, but will affect CC.
--paulr