Liquid chlorine shelf life

TheDeuce

Gold Supporter
Jul 9, 2019
186
Winnipeg, Manitoba
Pool Size
80000
Surface
Vinyl
Chlorine
Liquid Chlorine
Hey guys,

Canadian Tire just started their annual sale on liquid chlorine - $3.79 for 3.6 litres (just under a gallon) instead of the usual $4.79. I'd like to stock up but I've seen numerous posts talking about how liquid chlorine loses its strength rather quickly.

But just how quickly?

I recall that LC's half life is dependent on the temperature it's stored at. In my case I can make some room in our mechanical room which, during the summer while the AC is running, stays around 65-68 degrees Fahrenheit. Never over 72. Pool shutdown for us is typically at the end of September so I need around 4 1/2 months worth of supply. Would my LC still be relatively potent if kept in a 68 degree room for 135 days?

Thanks in advance,



m.
 

DiverGirl1972

Gold Supporter
Silver Supporter
May 11, 2018
217
Delta, PA
To share my recent experience.... Last year, I stocked up on 10% in the Spring as the pandemic got rolling. Not too long after, I decided to just go ahead and get a swg. I gave a lot of it away, but I kept some of it in case I needed to boost my levels for heavy usage or whatever.

Mine was stored in the dark basement where the temps are from 67 - 70. I still had 6 gallons left this year when I opened. Based on my testing before and after my additions, it was still half-strength (5% ish). The Julian date on my bottles is 20 015, so it was about 16 months old at that point.

I think yours would stay fairly potent through the summer.
 
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wayner

LifeTime Supporter
May 31, 2012
618
Toronto, ON
Pool Size
100000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Jandy Aquapure 1400
That thread on storage tops only has fairly high temperatures, can I assume that it last longer in cold and freezing temperatures?

I store my LC in my pool cabana and like the OP I live in Canada. I don’t use a lot of LC since I have a SWCG. It I had two 10L jugs out there over the winter. They still seem to be fine in the spring as I use some LC until the water is warm enough for the SWCG to get up and running.
 
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