VIVOHOME Pressurized Biological Pond Filter, 1840GPH Suitable for Koi Ponds up to 1000 Gallons or Ornamental Ponds up to 2100 Gallons

I'd highly recommend this product. It is very easy to clean as you turn the nob to the clean option and turn the handle on top. It comes with many size attachments. My pond pump uses a 1 inch size hose, which this filter has so it fits perfectly. It cleared up my pond water so fast. I would not recommend leaving it out in winter because I did this and the UV light broke, so that's my own fault. With proper care and storage this filter will have a long life.

Crystal clear water, easy to maintain and clean filter. I flush my pump 1 or 2 times a week... takes me 3-4 mins, no need to dismantle... just switch the outlet to clean, rotate the handle a few dozen times and wait till the water runs clean... the uv light works great to keep the algae down. I've got one of these in each of my ponds, both heavily stocked and my water is clean and clear.

Excellent product and works very well. Only concern is that the instructions are non existent. Had to watch a YouTube to figure it out. Took about 24 hours to clear my pond to crystal clear water! Fish are happy, I’m happy and I definitely recommend.

I have a small ~700 gallon Koi pond with a waterfall. The pong is about 4' deep. I've struggled for years with brown or green water that made it difficult to see the fish. My home grown filter was also a major pain to clean. I decided to purchase a "VIVOHOME Pressurized Biological Pond Filter, 1840GPH" filter along with a "VIVOHOME Electric 120W 2700GPH" pump and 20' of 1" flexible tubing. Setting up the filter and pump were straight forward and easy. Below are my observations about performance: After 24 hours I noticed a remarkable improvement. The water was a lighter shade or brown/green and I could see fish shapes about 6" deep. After 48 hours the water was light brown in color and I could see fish about 12" deep. After 72 hours the water was slightly brown but I could see about 4' down. As I write this, the filter has been running 96 hours. The water is crystal clear and I can see the bottom of the pond clearly and I'm completely satisfied with the filter and pump combination. When setting up the pond I located the pump at the far end of the pond and away from the water fall and placed it on a plant shelf about 12-14" deep. I located the pump here to improve water circulation and also to keep the pump out of the muck that accumulates on the bottom of the pool. The pump is pushing water through 20' of one inch tubing. The water fall flow is more than adequate, but if I had to do it over again I would have used 1 1/4" tubing for increased flow. I'm happy with my purchase. The filter is easy to clean and mess free, which was not the case with my old home grown filter. I should have done this years ago. I hope this review is helpful. Best wishes.

Cleaned large pond up in less than 2 wks, so bought the smaller one for my smaller pond. Easy to set up and use