On 15 Apr 2004 08:11:47 -0700, (G-Hoch)
wrote:

A couple of years ago I made a base for a water lily spitter out of
quick-crete but I heard that you shouldn't put quik-crete in a pond.
What is the difinitive, once and for all answer to this question. I
say where someone was making an underwater light with quickcrete and
no one questioned.

P.S. How do you spell quikcrete?

http://www.reboysupply.com/quikrete_products.htm

The concrete answer to your question is relative to the amount of
water and concrete. The danger is in the type of lime used in
concrete. In excessive amounts it can cause the pH to rise as high
as 12. A concrete pond is treated, or coated prior to adding fish to
avoid this happening, smaller amounts of concrete are often used in
ponds without problems. To be on the safe side, one could wash the
concrete piece down with an acid solution like is used for cleaning
bricks. I have a concrete liner behind my waterfall and wouldn't
hesitate to make a light weight using quikrete and cure it before
putting it in the pond.

Regards,

Hal