Losing chlorine

[joecus]

You'll have to shock really high if your cya is high to do the same job as a lower chlorine level in a lower cya pool. But, as long as you get to shock level, the chlorine will kill the algae. Not sure why your pH is dropping. Have you added anything other than bleach to the pool?

Wow, it's so hot. My power just came back after 24 hours out. No sleep last night. I was in the pool at midnight, 3am and 5am. Today, my ph is 7.8. I am not doing the refill until the weather breaks here in NYC. I will keep the CL high to compensate for the high cya. I will let you know if the PH drops again. Does the filter play a role in killing the algae? I've been running it about 12 hours a day.

[aylad]

The filter's role is to remove the dead algae from the pool after the chlorine has killed it. Wow, hope your power is on to stay now!!
Janet