Can I leave my Chlorine level high over winter?

8ightiesfan

Active member
May 26, 2020
37
Canberra, Australia
From Australia so now entering the winter period.

I recently shocked our pool to clear a small green algae outbreak and now it is crystal clear and well balanced, except the chlorine level is still very high around 13ppm.

Now that the pool will not be swum in again until September can I just leave the Chlorine level high? Will this cause any damage to the pool or equipment? I am just thinking of leaving the Chlorinator at a normal level and let the Chlorine level drop slowly to help keep the pool sanitary.

Thanks
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,406
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Test strips don't cut it but if you believe them, that is up to you.

You should check out Clear Choice Labs. They have proper test kits available in Australia.
 

8ightiesfan

Active member
May 26, 2020
37
Canberra, Australia
Test strips don't cut it but if you believe them, that is up to you.

You should check out Clear Choice Labs. They have proper test kits available in Australia.

Thanks, I have been looking into a more complex test kit than the 4in1 I use now. I will check them out.

In answer to my question, assuming CYA is ok which I will confirm, will leaving the FC level high cause any long term issues?
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,406
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
I assume a 'OK' CYA is something around 30-50. If so, it is fine. Nothing will occur.
 

thefloatqueen

Bronze Supporter
Dec 24, 2018
958
Columbus, Ohio
Pool Size
7500
Surface
Vinyl
Chlorine
Liquid Chlorine
From Australia so now entering the winter period.

I recently shocked our pool to clear a small green algae outbreak and now it is crystal clear and well balanced, except the chlorine level is still very high around 13ppm.

Now that the pool will not be swum in again until September can I just leave the Chlorine level high? Will this cause any damage to the pool or equipment? I am just thinking of leaving the Chlorinator at a normal level and let the Chlorine level drop slowly to help keep the pool sanitary.

Thanks
I sure did!! I closed my pool at SLAM level (20 ppm since my CYA was 50) as late as I could in the fall and would periodically add a little liquid chlorine a few days a month when the water wasn’t frozen and use a brush to swirl it around (I did not use a winter cover.) You don’t lose as much FC in the colder temperatures, especially if you are covering your pool. But no regrets here. Easiest spring “opening” ever!
 
Last edited:

8ightiesfan

Active member
May 26, 2020
37
Canberra, Australia
I sure did!! I closed my pool at SLAM level (20 ppm since my CYA was 50) as late as I could in the fall and would periodically add a little liquid chlorine a few days a month when the water wasn’t frozen and use a brush to swirl it around (I did not use a winter cover.) You don’t lose as much FC in the colder temperatures, especially if you are covering your pool. But no regrets here. Easiest spring “opening” ever!

Frozen pool!!!? We don't get that cold here ? Great to know I can maintain a high FC level and adjust it down when it warms up. Thanks
 
  • Love
Reactions: thefloatqueen
Thread Status
Hello , This is an inactive thread. Any new postings here are unlikely to be seen or responded to by other members. You will get much more visibility by Starting A New Thread