VIVOGROW Bio Pressure Pond Filter, with 13W UV-C Light, 1050 GPH Suitable for Koi Ponds up to 500 Gallons or Landscape Pools up to 1050 Gallons

I'm not interested in spending the over-the-top money for the more established brands, but my small pond and goldfish need a filter solution. I really like how this filter is put together. It doesn't leak and the connections seem pretty secure. It's survived one freezing winter so far with only partial draining - still doesn't leak. The bypass works, and I can turn the handle and water comes out, but (maybe its my particular setup) I don't notice any gunk coming out. I haven't even plugged the UV in so I cannot comment on that

Easy to install and built well. The filter is easy to clean with the filter pads rinsing off well. The UV sanitizer works perfectly and my pond is crystal clear. Previous filters did to seem to handle the job as well as I wanted and this filter has performed above expectations. Prior to installing the unit you could barely see my fish. Now you can see all the way to the bottom of the pond. My pond is about 10 feet by 4 feet across and 30-36" deep depending on where you measure. This size filter handles the needs very well. I noticed a difference in the first 24 hours but after 3 days of running I was very impressed. I have had this unit for 2 summers now and it is working perfectly. I clean the filter pads every two weeks and my pond is perfectly clear. Easy to use, easy to install and great performance. Highly recommend.

We have a 6’x 9’ pond with ~12 fish. The water was very hard to keep clear, especially in warmer weather. We tried all kinds of clarifiers and enzymes with little help. After installing this filter, which is fed by a 600gph pump, it cleared the water within a few days. There was no noticeable drop in water rate to the waterfall after the filter. One thing that is not advertised is that there is a compartment in the bottom of the filter full of bio-balls, so this is both a mechanical and biological filter. It seems well made, and was easy to install. I buried most of it into the ground to keep it out of sight. Very happy.

Keeps my pond clear. Been fighting string algae. Helped beat it back and remove the muck from it like it was there.. Only have had to clean filters twice whole summer without having to install my in pond skimmer. Works like it said it would. No leaks. Instructions were clear easy to understand.

2nd time purchasing this unit. Easy to install and use. The pump mechanism when cleaning the filters gets stuck over time and eventually it does not work. The UV light also went out over time. Ordered a replacement, but componentes were corroded, so did not work. Eventually the housing unit for the UV light sprung leaks through the gasket and screws. I still give it a high rating. After all, the previous unit lasted me 2.5 years with every day usage.