I have a mystery with my pool and I'm hoping you all can help. We hadn't been swimming much because it has been raining almost every day. We were out of town Aug. 15-18 and the day we got back we went in the pool. So the 18th was the last time it had been used. That day, I noticed little tinges of green here and there--around the cove mostly--but it didn't feel slimy and it quickly dissipated just by swooshing it with my foot. I didn't brush. My chlorine tested at 6 FC and 0 CC, so I figured it was just leaf staining or pollen. Since then, the solar cover has been on and we haven't been swimming.
Yesterday I peeked under the cover as I was getting a water sample, and all over the bottom of the pool was green stuff. I tested the chlorine and again it was 6 FC with 0 CC. I noticed the low salt light on the SWG was blinking so I added a bag of salt and topped off with liquid chlorine to shock level (20) just in case my test is out of whack. I brushed to dissolve the salt and the pool clouded up from whatever was on the bottom. I switched the filter to continuous running and then later on in the evening, I switched the SWG to superchlorinate and I left the solar cover off. (I realize now that it messed up my chance of doing an overnight chlorine loss test by leaving the SWG on.)
Here are my test results from yesterday and this morning:
Yesterday (after adding salt)
FC - 6
CC - 0
Ph - 7.2
Salt - 2600
Borates - 50
TA - didn't check because it generally doesn't change that much
CYA - 70
Temp - 84
This morning the water was just a little cloudy, and there is still green in the areas where I could not brush, like under the ladder.
FC - 22
CC - 0
Ph - 7.6
Salt - 3200
TA - ???? (see below)
Temp - 82
Decided to test TA since I was planning to post here and I figured you'd want that, too. (**** dark green reagent leaked and got all over my shirt--grrr.) The TA test results were very strange. Instead of going from green to purple and then magenta/red, this time it went from green to pale aqua blue, and then at drop 13 and higher it stayed at a pale orange color, like the color of very weak iced tea. What the heck??? Could it because the chlorine was so high?
Now I don't know if this could be a factor in all this but about 5-6 weeks ago, I reduced the pump run time from 8 hours a day to 7 as a test to see I could get by with less run time. It runs from 10 to 5 which is when the pool gets the most sun. It seemed to be doing fine until all this but I want you to have all the facts.
I bought all new test reagents at the beginning of this season, so I'm not using old testing stuff either.
I'm so confused! What do you all think is going on here? What should I do next?