Long time viewer but this is my first post. I've got 26000 gallon peanut shaped pool that I WAS using 2 trichlor pucks in plus 2 bags of pool store cal hypo weekly. (Leslie's power powder). But let's go back. When I started opening my pool two months ago my cya was literally zero. So I did what I do when it's zero and I added small amounts at a time over the course of a week or so til it was between 20-40 per 7 way test kit. Well, started with normal yearly regimen 2 bags cal hypo granules, about a liter of muriatic acid and two floating pucks. When I was at the pool store every word out of their mouth was phosphree and buy this then drain the pool and get some more phosphree. So I called somewhere else and he said switch to a non chlorine shock every other week and get rid of the pucks altogether. He also told me because of where my pool is (direct sunlight in a desert literally surrounded by cow farms) it's been better for his customers to have a cya near 80 to combat the rapid breakdown of chlorine from the intense sun and rapid floral growth from all the farms. My pool is still clearer than tap water but I can't figure out why my cya is going up. These are my pool test results from yesterday pre-chlorine treatment.