So now I have this 350 gallon hard shell pond, you know the type, solid and made to go in the ground. I talked on here before and found the best way to clean this is; I installed a typical bathtub drain in the bottom and attached to the outside bottom of the drain is an L shaped PVC pipe , attached to that, is a garden hose adapter made of PVC; the entire thing sticks out about 5 inches from teh bottom side of the ponds deepest part. I plan to use gravity to drain and fill this pond regularly. I will set it on a slight hill in the duck yard, and attach the garden hose to it so when emptying it, I can use the water to water various trees and plants. Today I spent yet another 150 dollars on a nice submersable pond/fountain pump; I dont think the water should set stagnant; would be better if it keeps moving. I was so excited to get the pond going the duck LOVE it. I put the pump in the bottom of the pond and withing 4 hours there was barely a trickle visibly. Took it out of the pond, took the pump apart and cleaned all the grass and duck funk out of it, plugged it back in and ""voo-a -la" works great again. This pump was made for 300 to 500 gallon ponds so, heres the question....How do I keep the water flowing in the pond without clogging up the pump so fast? Im thinking of placing the pump in a coffee can riddeled with holes ?????? Any good ideas appreciated thanks fellow ducksters.