I have recently taken a job at a large residence. One of the many new install problems is 2 ponds connected by a stream. No filter, a few cattails, and a couple of lilys. NOTHING has been done! Both pumps 11,000 gph have burned out from pumping dirt and sediment/algae. My pump well is gravity fed from the lower pond and no longer fills at more than 3-4000 gph...its clogged. At the intake in the pond I am told I have 2 tandem loads of gravel as a "filter". Aside from the immediate problem, What does one do to deal with 300,000 gallons? Chemicles? Filter? Plants?