Alum at Wal Mart
Posted by: Toysx2 on Feb-24-13 7:12 PM (EST)
I have tried the alum technique a couple of times and it has worked well. One of the guys on our 7 day San Juan River trip developed a leak in his soft-sided water container. He used alum and a water filter to re-supply from the river. Wal Mart has an extensive collection of McCormick spices including the alum.