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My pool has a sky blue Quartz finish. I have been noticing black dots in the Quartz. I put on a mask and went diving. It is not Algae. Its like parts of the peebles in the finish are turning black. They look like a tiny mark from a sharpie. They are flat within the finish itself. I have...

Here are my numbers using the taylor test kit. Just wanted your input on where I am and if I need to add anything. thanks Water temp is 64 FC - 3.8 CC - 0 PH - 7.8 TA - 100 CYA - 90 CH - 240 Salt - 3100

I have a SWG plaster pool. All numbers are good. Calcium is at 290. Should I keep that around 350 to 400 to prevent plaster damage? Thanks

I dont have the ability to put my pump on just circulation. Can I still do AA treatment with it filtering?

Not sure what has happened. Just bought the house 2 months ago with a pool. It did not have the white areas or black dots before. At least none that I noticed. Water was not as clear as it is now. Seems like the more I do to care for the pool, the worse it is. The black dots will not scrape...

Just getting settled in to the new house. Had a couple questions. Is it better to leave it open during the winter or close it down? Or is it just preference? Also if my FC is maintaining, is there any reason to raise my CYA in the winter? Thanks Recent test- pool water 68 degrees and clear...