After purchasing some shock for my pool, I read that it looses its potency, but if I keep in a a cool dark place it should be okay for when I use it during June-August. Now, I'm worried how long ago was it bottled? oh boy... Do these numbers printed mean anything as far as how old this might be. Thank you. (I bought early because I read there might be a shortage as people will buy to use a bleach replacement)
Bought some liquid shock today for the summer. Did I buy too early ?
- Thread starter debmar
- Start date
- Jul 21, 2013
- 52,450
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
It will be fine for a few months.
Chlorine Date Code Decoder - Further Reading
www.troublefreepool.com
Breakdown of Bleach Over Time by Storage Temp - Further Reading
www.troublefreepool.com
The numbers do tell you when it was manufactured. The 20 076 on the bottle and the 20 075 on the box. Those were made on the 75th and 76th day of 2020, March 15th and 16th of this year.
That's pretty fresh stuff 
Those coded dates are called "Julian Date" (after Julius Caesar, a couple of popes and stars and the like, y'know?) .
You want to buy liquid chlorine no older than 2-3 months age. Then as you say you will-store in cool dark place and you should have no problems.
Maddie
Those coded dates are called "Julian Date" (after Julius Caesar, a couple of popes and stars and the like, y'know?) . You want to buy liquid chlorine no older than 2-3 months age. Then as you say you will-store in cool dark place and you should have no problems.
Maddie