Questions: My pond is about 2/3 of an acre. I have been battling muddy water for some time. added a 40lb bag of alum and it worked pretty well for a short time. I should first addmit I have way to many fish in the pond so I know the activity is more than likely kicking up the mud. The question is when adding the alum or gypsum do you continue with aeration or turn it off once the water has mixed the alum in well? My next question, is ag lime just the lime you can buy at Home depot its about all we have out here and how much do I add?