Mike, what material do you have the shallow end lined with (pea gravel, sand)as this can make a big difference. The best thing we have seen to avoid the resuspension of clay and dead organics is a material from stone quarries called "screenings"We also employ dump trucks that have "slingers" that can place stone sand screenings out in beach areas in ponds that are already full via a conveyor belt.Welcome to the PB Forum Ted