28,000 gal plaster pool with a SWG
Using TF-100 test materials
It was clear a week ago. It suddenly became cloudy and slightly green, and running the filter 24/7 isn't working. I can't see the drain cap in the bottom of the deep (8.5 ft) end, but can see the vacuum. Filter is less than 2 years old and was cleaned a month ago. It's not saying it needs cleaning again. We vacuum with a Polaris 280.
pH 8 (up from 7.2 on Sunday?)
CH 200 (down from 260 on Sunday?)
It has rained a bit but not any large or unusual amounts. The water almost looks as it does during the worst of pollen season (we have a very pollen-y backyard), but nothing else is coated in that mess any longer, thank goodness. At least we can breathe.
The CH drop is odd. We repeated it 3x with water mixed around and from deep in the pool just to make sure. The pH increase seems strange too. After the 7.2 result, we added less than half the recommended amount of Borax from the pool calculator because that was all I had in the laundry room. The only thing else that was added was 80 lbs of salt (Splash Ready Dixie Crystals brand) on Friday. Our SWG has been acting up, but we used liquid bleach when it wasn't working and haven't had a drop in chlorine levels. It seems to be working again. We are adding the recommended amount of acid tonight to increase pH and will add some calcium, but I don't want to add too much in case there's something crazy with the test. The materials are maybe a year old (from TFTestKits directly) but have been kept indoors and seem fine otherwise. We waited to make sure the test didn't turn back to red. It went blue easily and stayed blue.
Any ideas? My husband is starting to slightly paranoidly jokingly wonder if the pool company (with whom we are having issues due to the pool not being 100% complete after TWO years) added something odd when they came to check on it last week. Thanks so much for your time!