Closing pool

Jul 28, 2013
11
Maryland
Pool Size
24
Surface
Vinyl
Chlorine
Liquid Chlorine
Hi,
Ive been battling algae every summer. I have been pretty vigilant this summer in keeping all of my levels good. But, for some reason I still keep getting algae. I nip it in the bud but, it keeps coming back. I see some green on the walls but I also constantly get this brownish sediment in the bottom of the pool after running the pump. I vacumm it up and it comes back. if I don’t run my pump I will not get it. If I don’t shock it, it starts to turn green. Its been doing this for years. This spring was the first time in years that my pool looked like a swamp when I opened it. I didn’t do anything different last fall that I had done every fall with the closing chemicals. The pool was clear and balanced when I closed it. So, I’m looking for advice on what I should do to try to ensure that I don’t have a swamp next Spring. I just joined this group this year and have been trying to follow the program. Here are my most current test results. FC -8, PH-7.9, TA-73, CH-260, CYA-39.
 
The best way to avoid opening to a swamp is to close when the water temp is below 60 and open when it's still below 60.

Algae problems are ALWAYS "not enough chlorine".
 
I was hoping to find out what chemicals to use to close it

There are no specific chemicals needed to close your pool. I add a bottle of Polyquat and that's it. Optionally you could bring your chlorine level up to SLAM.

 
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