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So last Sunday the pool store said my CYA was 60. Friday I tested again I got around 55. The following day Saturday I took it to the pool store and they said it was 40. Previous tests at the pool store have also differed one was 30 then 50 then 40. I will test it again myself and post my...

I know most of you use the bbb method. I have heard some say they use them when they go on vacation. Are there any reasons for not using them besides CYA? Do they put other stuff in the water besides chlorine and CYA?

So on the site it says phosphate levels are not important? Does anyone have a good explanation as to why? I know that if my chlorine levels are correct I'm not going to have an algae problem. However sometimes I am gone or neglect the pool and have found my chlorine level at zero. Will having...