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Tonight's readings are : Chlorine: 29 ppm CYA: 90 pH: 7.8 Alkalinity: 130

is this staining or is this algae? It doesn't come up with brushing. We had sand pushed back into the pool a few times so we've picked quite a bit of that up. It's all on the liner, the water is completely and crystal clear. I plan to check the chlorine overnight.

I'll try to find the bags! It could have been the HTH kind - we got it from Costco! It was a powder!

Yeah we learned a lot for next year. Hopefully we won't have as much crud on it as we do this year. Our filter is brand new. We did do a deep clean on it the other day when we lowered the water levels since had ran some crud through it.

Okay I checked again this morning - seems CYA is 90 so I added chlorine to get up to 35. Should I let some water out this evening though to get the CYA down eventually for swimming? I know this may not be possible but I was hoping we'd get there by this weekend due to our weather being 90+ so I...

Yes it's liquid chlorine

It's liquid chlorine

Also this is what we got from the pool store, is it correct?

Also my partner did take a sample to a Leslie's pool store today and got it tested. They didn't detect algae but their results seemed skewed from ours.

After removing 50% of the water - this is where we are at currently. The Cya test is still giving us conflicting results. Maybe between 50-80? The chlorine was at 40 ppm yesterday and is around 25 ppm now. pH dropped to about 6.8 too.

Okay but how did our cya get so high? And how do we avoid doing that again?

At first we were using bags of shock but then per the guidance of a pool store moved to liquid chlorine to help kill the algae and raise the pH. I get right below the 100 line before I can't see the dot anymore. I'll check that method out.

Good evening! I am a first time pool owner and over the winter our pool cover rotted so our pool became extremely contaminated with algae, pine needles, and other gross stuff. I unfortunately did not find this thread until after we had already been trying so many things (and wow, what a learning...

Bought a house last August with a pool, partner and I have never owned one so it's been a learning curve!