Disapearing CL

[duraleigh]

Whether you can see them or not, you're still killing organics in your pool. Chlorine is consumed by the Sun and organics. You've got a nice level of CYA in there for Sun protection so the only thing left is organics.

Your problem is not unusual but, in fact, the single most common problem on the forum....you need more chlorine.

Test your Cl level at dusk and add enough Cl into the pool to bring it to 15ppm. Test again before the Sun hits it too hard tomorrow AM and, if it has dropped much below 14ppm, you are killing organics. I would continue to do that until your cl stays up overnite. Since your water looks so good, I don't think that'll be long.

Meanwhile, put a couple of jugs of Clorox in there if you want to swim today...you'll be fine.

Yes, the deal about T/A was bull hockey. However, you got it to 120 which is just perfect.

[geordie]

If you are floating two disposable chlorinators with trichlor in it, keep a very close eye on your ph. If you are using trichlor in large amounts your ph will drop quickly when they start to dissolve because it is very acidic.