Thought I would post this here first, as opposed to the waterfall & pond thread. I suspect I don't have the proper filtration for a waterfall we installed. 8" intake line utilizing 2-4"x6' well points. After a short period of time the flow is less & less, making the feature less attractive. Relatively easy going in every spring, but a real bear removing it. It holds a lot of water. The demand is great...I need pert near 600 gpm to make it look right. The bank under water it rests on is close to 45 degrees, and is 15' deep. I know the wellpoints are off the bottom because of the angle of the tee. Debris is choking the slits on the wellpoints slowing down the flow. I'm looking for ideas to improve the intake flow and making it easier to remove.