Total noobie and I've been doing a lot of reading here before posting. I live in Phoenix, just bought a house with a 10k gal. pool that's always in sunlight and hired a pro to help me for the first month. He immediately suggested a drain and refill, which I did. After a filter rebuild, a DE treatment and four weekly service visits, I decided I wanted to handle this on my own going forward. I got the AquaChek 7 test strips, a bunch of stabilizing chlorine tablets and some muriatic acid.
I am very concerned about these readings. How can they be so high one month after a drain and refill and one week after my pool guy stopped coming over?
Total hardness - 1000
Total chlorine - 10
Free chlorine - 5
pH - 7.8
Total alkalinity - 200
CYA - 150
My pool is only 4.5' deep, so there is a lot of splash and water loss when I swim, which is every day. Am I looking at another drain and refill to get this CYA under control? And what to do about the other readings? Please hold my hand. Thanks.