Chloromatic

Salt water pool

The name "chloromatic" has been torn by so many manufacturers it is difficult to say what brand and model that you just pass the name. Monarch is one, as currently Jandy who bought the original in North America "Chloromatic. Is this unit Beige color? How long do you buy? This will be a start.
If so, I'll dig deep to find my old service tech manuals for her. It was at least 10 years that I worked on. They are not exactly the best and had problems with circuit boards fried.

I do not know I remember 7 is acidic and 10 is the base, I think.