Add chemicals or drain first...
Been having algea trouble all year... biught a good test kit and found the following:
I assume the high CYA- plus high chlorine is leading to low calcium- not to mention the algae I've been fighting
Which do you suggest I do first: I add the calcium chloride to raise the CH or replace the water to lower the CYA?
Just re surfaced the pool last year - concerned about the low CH level messing up the gunite