It would be useful to know why you think the water quality is substandard.
Three primary possibilities would be as follows:
1. Suspended sediment or clay particles caused by agricultural runoff or shoreline erosion from wind or livestock activity.
2. Suspended single-celled algae, usually the result of high nutrient levels.
3. Fish activity--i.e. carp and/or other bottom dwellers in high density, rooting around on the bottom of your pond.
What's your guess?
