Hey Rainman!!

I know nothing about gypsum, alum and pounds per acre foot, but I want to say THANK YOU for coming back to the forum and sharing again. We really value your time and experience and many have ongoing questions about turbid water, how to clear it, how to do it safely, how long it lasts etc.

You can see just above your post that SetterGuy had some questions for you about how long your work at his pond should be expected to last.

Please check in once in a while! It is appreciated!