We recently opened our new pool and I posted numbers in a different thread.... my Pool Store said to bring them water about monthly so they could check it in order to maintain the warranty on the Pool heater.
So my wife drove up some water and they they said everything looked ok but the CH was low.... and they want her to raise the CH level or it could damage the heater copper could turn hair green etc...
he pooled out a "Big bucket of something" as my wife called it but she didn't buy anything on this visit.
My CH test was 120 this morning... should I worry about raising to protect the heater or are they attempting "pool Store" us?
I'm obviously in a good range otherwise for a AGP with Vinyl liner