Pond Boss Forums INTRO Questions & Observations gypsum

I have two horses that drink out of our pond. I want to add gypsum to the pond to help clear it up. My wife wants me to make sure it is safe for horses to drink from the pond after the gypsum has been added to it. Is it? Putting a fence around the pond is not an option.
thanks

From a prior thread wrt wallboard as a source.

Here is an aggregate list of links on the wallboard subject just for all you link lovers.

http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=20;t=002752

Gypsum can be purchased in the form of sheetrock wall board. Most all home improvement stores have it. Do not use the pink colored type and try to be sure there are no added fibers as binders. It can be broken up and ground to small pieces and put in. The way to find out how much is to take a water sample in a jar --say a quart --measure out small amount of ground up gyp. measure it and add to see when it clears. Then do the calculations to see how much for the vol of the pond. Read these esp. the last one. Good luck.

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=16;t=000073

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=16;t=000066

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=16;t=000068

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=16;t=000049