Preppers’ PING!!
I found this interesting and not just for water prepping as gallons of bleach would be essential during a pandemic.
Magichem Bleach Tabs (makes 10 gallons of bleach per card- 4 cards per order) $24.95
These are very compact, practical, take up very little space, and unlike bottles of liquid bleach, they do not lose power until combined with water into liquid bleach. They are usually not very expensive either, and they will store well for years, ready to be turned into fresh bleach when combined with water.
PING PLEASE