bowtiebubba, have you read other threads on this forum that discuss the jar test? I believe you collect some pond water in a big glass jar, and then let it sit for a few days.

If it clears up, then it points to more focused options.

If it does not clear, same thing, it points to other focused options.

It may also help if you describe your pond a little bit more especially about what the shorelines are like, and what kind of run-off you get.

I'm not at all saying that gypsum or lime are not the answers; I just think there are some preliminary steps to take first to make sure you understand the cause and can then effectively address the problem.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."