On Sat, 30 Oct 2010 22:12:45 EDT, Pat wrote:

Yes, it's powdered. The pond is not very big, about 12' x 12'.

Are you hoping for a clear water pond? Koi mud ponds use clay for good
growth of the koi, but the water is usually murky brownish green. Koi &
even goldfish fish love to dig in clay for the aquatic critters that live
in it. Thus you can rarely see them. Now if you're just going to grow
lilies or something... ? What are your plans for filtration?

12x12, you'd be better off with a rubber liner if you want clear water.
~ jan
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Zone 7a, SE Washington State
Ponds: www.jjspond.us