I get my bleach from a friend of mine. I get a 5 gallon jug at a time and its 12-15% per the label. Because its a large jug I keep it in my shop in the back yard. It gets pretty hot in it but nothing crazy due to having a 16" exhaust fan that runs off a thermostat that I keep at 90*. Once it comes on it pretty much stays on all day but does pull a good about of air through the small shop. I know its said for bleach to be store at room temp but its just not practical to bring it back and forth to inside the house. Should I expect the strength to weaken before using it all?
When using Pool Math I always enter 12% even though it has a possibility of being 15%.