Never Ending War on Algae

[aylad]

Actually, you shouldn't see any liner bleaching with those chlorine levels, even with zero CYA. The CYA makes the chlorine sort of "less aggressive" , which is why you have to raise your maintenance chlorine level when you raise your CYA levels. In order to kill off the algae with a CYA of 40, you need to be at a chlorine level of at least 15 ppm, held there as consistently as possible, until the green clears up. I would keep it at 15-17 or so, if you can. Brush the pool after each chlorine addition, and be diligent about it-- and it will clear.

The fact that your DE didn't appear to come back into the pool is a good thing--it means that your filter is doing what it's supposed to do and catching the dead stuff when it goes through.

Janet

[Blueshell]

Well thanks to your help and support, I now have a beautiful clear pool. It's so nice to see blue instead of green. FC this morning was 13, PH-7.6 and CYA-50.

Should I keep the high FC for a while or start to let it drift down?

To everyone in the forum, don't give up. You have to really hammer this algae. Stick with the system.

[Watermom]

Do you still have a CC reading of 0 or at least no more than 0.5ppm? If so, then go ahead and let the chlorine drift down and make sure you keep it between 3-6ppm all the time.

Good job! Now, it's time to go swimming!