Hi all,

I just got a 10 gallon water cooler to store water in. The cooler is
totally opaque (it's one of the yellow Igloo pigs), but I'm thinking that I
should add something to prevent Icky Stuff from growing in it. I have
Physan, but that's a bit expensive to be constantly using. Is household
bleach OK? How much per gallon?

Thanks.

--Matt