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So I'm pretty sure now this is a calcium scale problem after looking at more examples on the forum and some further basic testing. Things are *slowly* improving now that the ph has been in range for close to 2 weeks, but I just did a CH test and it has increased by almost 100 to 360 (of course...

Yeah well at least it starts that way after draining below the returns, who knows when it goes under again, it opened full of course due to snow melt and rain.

Oh and to be clear for comparison, the top step is completely clean (why? I don't know.) and that's what it should all look like.

Okay, vitamin C will be my next test. I did the solid chlorine test in a spot and basically some of the green did change, but to white. Basically everything seems covered with a white film that is green with algae in places. I can't clean it with the steel brush, but I did get down and dig...

Okay, I updated that info for things I knew specifically, I'll make it more complete later. This is city water and I've never had any water problems before.

Hi, been following for a long time and been able to take good care of the pool for around 10 years. This year for the first time I am having a disaster opening the pool because I don't know what the issue is. I have a very tough (almost impossible) to remove algae, there are green sections...