Never Ending War on Algae

[Blueshell]

Put a handful of DE in the skimmer. Didn't appear to come back into the pool. Should I try it again at some point?

This mornings #'s:
FC-14.5
CC-0
PH-8
TA-140
CYA-40

I've been shocking the pool all week. There is less green for sure, but it's still there.

Beside bleaching out the liner, is there any other damage that will be done to the liner at these high FC levels?

I'll stay at it.

Sure appreciate your help!

[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!