After a year's odyssey through cloudy water in the whirlpool, I came across SpaBalancer via a recommendation. I have a whirlpool from Optirelax, Cayman model, and had used the manufacturer's recommended and overpriced chemicals. I constantly had to top up with PH-Minus to keep the foam under control to some extent. I have been using SpaBalancer for three months now and have never needed PH-Minus again. I could save myself the measurements as they are always correct. ?
So, enough writing. Into the pleasure! The clear water invites you to splash around at 27 degrees.
Your Tom H.