Chad Carson asked:


I moved into a house with a large koi pond over the summer. The waterfall used to flow quite strongly, but now the flow is very weak. Even when I run the water straight from the pump to the waste tube (bypassing the filter and waterfall), there’s not much flow. I emptied out the leaf basket that sits just before the pump, but that didn’t help. What else should I try?
Thanks for the suggestions. Yes, the flow is much weaker now than when I first moved in (even when it was running through the filter, but especially when it was bypassing the filter). I don’t think it’s settling — my guess is there’s something stuck in the pipe between the drain and the pump, or maybe the pump is dying.

Alida