Quote Originally Posted by USMCPOP View Post
I think the Bentonite is used in ponds to reduce leakage.

I have read that the really cheap, Special Kitty plain cat litter at Wal Mart is Bentonite. You want the kind that softens when wet.

Thanks Pop for the link, I'll keep it in mind when I price the WT that Bentonite sells. sounds like their WT is processed or mined from a special geology.