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I've read a bunch about the shelf life of liquid bleach (not my first choice for water purification because of the shorter shelf life) vs. using dry crystals of Sodium Hypochlorite (used to treat water in pools and hot tubs), which has a longer shelf life and seems easier to store. How do these compare to bleach tablets?
I bought some for my son to take to college (seemed easier for him than messing with liquid bleach), and I started wondering if anyone had any thoughts on using them to purify water in an emergency. One tables is equal to one cup of bleach, so you could treat a lot of water with them.
I had never heard of the bleach tablets, so I tried looking up the ingredients and was unable to find exactly what was in them. I know they have both scented and unscented varieties, but I assume you have the sense (!)to avoid the scents! One website mentioned the little disclaimer on the bottle that it wasn't intended for "disinfecting", so I just dunno. Not sure if it comes with an expiration date. Food for research, I guess.
Pool shock is CALCIUM hypochlorite, not sodium. It may come in both flavors, but ours is the calcium formula. This stuff is pretty pure, and very potent. I'm also pretty sure you get a lot more bang for your bleach buck with pool shock than with bleach tablets, which seem pricey for what you get. But please try to find out all the ingredients before you drink the stuff.
We use the tablets to make our bleach and we have used them for 20 years. Within the live-aboard boating community the tablets are very popular. They have very cheap, they have a long shelf life, and they do not take up much room.
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