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I'm about to order a new test kit. On the Taylor website, it says the FAS/DPD test can measure chlorine up to 20, while the PoolMath chart says I need to bring mine to 31 to SLAM it. The TF website doesn't mention this limitation. But aren't they both selling the same test using the same...

I am catching on to all this. Thanks for the helpful advice. I found 10% liquid chlorine at a great price (store going out of business), and will brush the pool and pump out water to lower CYA tomorrow. I've never had this problem before, and I'm wondering how much liquid chlorine I should buy...

The water looks OK except for a bit of algae in some spots.

Where can I buy liquid chlorine (Home Depot and Walmart don't have it in my area), and how do I know how much to use? It seems that the advice here is the same as one of the options mentioned by Leslie's -- add lots of chlorine -- except that it's a different form of chlorine.

High CYA seems odd because I haven't added any in a while, and often need to add some. - - - Updated - - - I could add chlorine manually, but it seems like I shouldn't need to do that. That's what I bought the salt system for.

I recently had the cell replaced under warranty. Of course I have my own test results -- except for nitrates, which I don't have a test for. I just re-tested and found .5 free chlorine, 1 total chlorine, pH off the charts high (had to add two quarts of muriatic acid), total alkalinity at 120...

I've had my saltwater chlorine generator set on maximum, but zero chlorine in the water. Leslie's tested my water and found nitrates, at a level of 50 (presumably parts per million). The Leslie's manager said there are only two solutions: add large amounts of chlorine, maybe as much as 200...

Thank you, gentlemen. What you say sounds logical, as the bromine level in my spa is very high right now.

Total alkalinity in my spa was quite low, so I added Alkalinity Up. Now when I test for alkalinity (using brand-new test solutions), the water in the tube turns light blue rather than green when I add the second solution. When I add the third solution drop by drop, eventually the water turns...