Well, I can't help myself. I put in a 2000 gph smartpond pump (needed it for once the new pond is built) to replace my 700 gph tetra pump. I had to shut the valve by 30% to keep it from overwhelming my filter system. But I like the falls better now. I"m concerned about the impact on the pump having the flow regulated like that. Will it do ok over time? Once the new pond goes in, it will be lifting the water almost 12 feet to the upper pond so I don't think the pump will need to be throttled back . BUt for the next month it should be ok right?