Thanks all. I do have about half the pond covered with water lettuce plants & a few water hyacinths. Those multiply so fast I have to thrown some out every few days. I unplugged the InPond pump & pulled it out this morning. I don't think it's doing anything. When I first pulled it out I heard a clacking rattling noise from it but then that stopped. After reading up on it, I'm wondering if the impeller is broken.

If so I could order another impeller but honestly don't know if I want to mess with it if I don't need the pump to keep the water healthy. I do, as I said, have the Pond Boss Waterfall Pump going. Sorely tempted to take the InPond pump back to Lowe's where my son bought the kit. I'd have expected it to last more than 6 months or so.