This morning, I woke up to a nice blue pool and went into work. At 10:00 AM, my wife called and said that the pool was green, so I drove home and poured in a gallon of 10% liquid chlorine and went back to work. I get home at 6:00 PM, and the pool is still green. The only thing I can think of that makes a pool green is algae, and you use chlorine to kill algae so I added two more gallons of 10% chlorine. My understanding is that as long as you're not swimming in it, it is OK to have really high chlorine temporarily. Hopefully I'm not wrong.
So, we went to eat supper and get home about 90 minutes later. Still green. It's never been this difficult... but Murphy's law and all.
Total Chlorine: 31ppm
Combined chlorine: 1ppm (I've never measured above 1ppm, wonder if my chemicals are not OK?)
CYA: Under 20, above 0. If I had to guess, I'd guess its about 5. Need to add more CYA. I can't keep CYA in my pool, don't know why. We've had a few feet of rain in the last couple of weeks though, that might have something to do with it right now.
Alkalinity: 140 (this test did do the blue to yellow shift instead of green to clear)
What else might be causing the pool to be green? 31 PPM is astronomical if you consider my nearly non-existant CYA. Could CYA that low be causing this issue?