[metmom]

Do you know of a good source of calcium hypochlorite?

I understand that what is used for pools is often recommended against because it contains other substances that would make it not recommended for treating drinking water.

[Kartographer]

Any local pool store should have it, also Ebay. One pound bag should last you a very long time. It usually comes in a plastic bag. You need to transfer it to something more suitable> I place mine in a mylar bag and then placed it in a used plastic coffee can. Gloves and mask are a must when handling.

Here’s a good article on it:

http://www.emergencyhomepreparation.org/viewtopic.php?f=25&t=97