We are doing our first ever slam on our new AG pool. We had lots of pool use in the hot weather and the fc went down to zero. I noticed the water looked really dull too. So...I am on day eight and was surprised that the OCLT went down from 18.5 to 15.5 last night. The water looks beautiful, it's sparkling away and the dull appearance has disappeared. The CYA was at 40 when I started so I've been working to keep the FC at 16. The first few days I didn't realized I needed to really attack and keep he FC levels up constantly, but I've caught on and now I'm checking levels every hour or two. We're having upper 90's to 100 degrees all week so it's taking a lot of chlorine, I'm using Walmarts chlorinating liquid 10%. So everything looks right to me except the OCLT numbers aren't staying up. Any thoughts? Yesterday the OCLT went down 1.5.