Magnetic Drive Water Pump 1800 GPH

I have been using a Danner 1800 GPM pump on my koi pood skimmer for the past 12 years. The pump runs 24/7. The last 2 pumps lasted about 6 years each. When my last pump started making noise I went to order a new one. I noticed that a lot of the recent reviews were not very good. I decided to order the pump any way because of my past experience with the same pump. Did I ever make a mistake. The new pump arrived and I installed it on my skimmer. The flow was less then then my prior pumps. I t started making noise after several days. I ordered a new impeller. After I installed a new impeller in the new pump it was quieter and the flow increased. The flow was still not as much as my past pumps. After a month it started making noice and the flow totally stopped. It was used so I could not return it. What a total piece of junk! I went on line and found a pump made by Atlantic that would fit on my skimmer with few modifications. The pump worked great loots of flow. It cost more but is so worth the price. I have several other Danner pumps on my pond. When they go bad I will not purchase another Danner. All of the recent negative reviews are correct.