Looking for Pond pump

[LarryB]

When I started my pond (2000 gallons) I tried all kinds of pumps - old sump pumps ; for a year I used a pool pump ( VERY EXPENSIVE on electricity ) then I went out and spent the money on a Laguna 7000 power-jet - at only 100 watts and about 2000 gph I love it. It has worked for about 8 years now and the impeller seems to be loose. I think the plastic housing around the front end has worn away letting the front of the ceramic shaft rattle. It will run for a while and then stop as if I turned off the switch. Letting it sit a while will get it going again for a while longer, but it's not smooth, I can actually hear rattling.

If buying a new impeller will solve my problem I'll be happy to. If not, what pump do you recommend ? I don't want to go down on my flow. I like the 2000 gph.