I have noticed that some of the posts regarding pool closing and high CYA levels say that the CYA level will disappear over winter.
Do the CYA levels only drop due to removing the water for a proper winter closing??? And then when you top up the CYA levels are therefore diluted?
I am in southern hemisphere in a colder part of Australia and have extremely high CYA levels - 170.
Swimming season here is only really November --> March and overnight temp doesn't really get below about 5C / 40 F very often. So not necessary to drop any water levels etc.
So I am trying to get on the front foot for opening up in two months time....
Do I have no choice but to drain or is there a chance the CYA levels will drop over the period of 2 months?
TC - 0
pH - 7.7
TA - 195
CH - 242
(Results from local pool shop, and they are telling me to put more trichlor in! Checked some test paperwork from last year and the CYA was 213 and they were still telling me to put trichlor in. That's the reason I am here!)