First off, I ordered a TF100 Test kit and I'm waiting for it to arrive, so I've been having my water tested at Leslie's and another local pool store since opening my pool for the first time. (Just moved in last summer)
I had my water tested at Leslie's last week and they said my CYA was 100. So then I did a big water change (Don't know how big but I timed the garden hose run time at 6 hours ). Then I had the water tested at the other store and they said the CYA was 58, then I had them test it yesterday and they said 55.
Then today Leslie's said it was still at 100?!?!?
Where is there error here? Who's right? I don't want to mess with anything till my CYA is in order.