Pool Shock – The Boilerplate When I started doing research for this article, I visited some of the most respected survival and preparedness blogs and forums for background material. After all, pool shock is pool shock and there must be some standards for use, right? With just one exception, all of the sites I visited included this boilerplate from the EPA: You can use granular calcium hypochlorite to disinfect water. Add and dissolve one heaping teaspoon of high-test granular calcium hypochlorite (approximately ¼ ounce) for each two gallons of water, or 5 milliliters (approximately 7 grams) per 7.5 liters of water. The mixture will produce a stock chlorine solution of approximately 500 milligrams per liter, since the calcium hypochlorite has available chlorine equal to 70 percent of its weight.
I found this as well:
http://selfrelianceclub.com/Make%20you%20own%20Full%20Strength%20Bleach%20from%20Pool%20Shock.pdf
Also, this old Chlorox service bulletin is like 101 things you can use bleach for. Removed from the Chlorox web site, the WayBack Machine has it:
https://web.archive.org/web/20131028194844/http://www.clorox.com/pdf/5813-100_service-bulletins.pdf
Download both, and if you’re really serious, print them out and store with your pool shock.
IIRC calcium hypochlorite needs to be stored carefully....
Pool Shock....Chlorine