Is gypsum board good to put in a pond? | Missouri ...
Sep 27, 2008· Bux n Dux, I think the paper will decompose, and sink in time. I am wondering if the gypsum in gypsum board will do the same as powdered gypsum to clarify the pond, and what effect it will have on pond habitat? However, you bring up a good point! Will the paper contaminate the pond?