Rotary Drum Filter,Canister Filter,RDF Fully Automatic Water Self-Cleaning Filtration for Koi Pond,Fish Pond,Aquarium,Seedling Cultivation Base,Aquaculture,Hydroponics (4000GPH Standard Edition)

Works flawlessly! Super easy to install and operate. Highly recommended.Update. Unit has been working flawlessly for three months. Wish I had gotten the largest one though.2nd update. This unit has been working non-stop for six months. I am running it through the winter since it is feeding my bakki shower and moving bed. No issues whatsoever this far.3rd update. It is been a year and the thingy still going strong. I converted it to WiFi enabled with a $20 bucks relay managed by Alexa.No way you can beat this little gizmo. Still feeding my bakki shower and two moving beds (75G/each).

What's bad:1. Box was delivered crushed. The cardboard isn't nearly strong enough for shipping these filters. The filter seems to function ok though, miraculously..2. Filter is rated at 4000 gph, but I couldn't even get close to that. With my pond water about 3000gph was the best I could do, without the filter in a perpetual cleaning cycle. No idea where the 4000 came from.3. This filter is pressure input, gravity output. You need to match the filter output fitting, so free flow output matches pressure input. Most importantly, the water output can never rise above the top of the output fitting. That means this filter must be physically above all output destination fittings in order to function correctly.4. Input water quality greatly affects this filters performance. Leaves and twigs cause bad things to happen when they get inside the drum. Need to filter those out first. The cleaning cycles are supposed to wash the waste out the sewage port. But about 5 % of that waste, ends up splattered on the inside walls of the filter . This ends up right in the output water. So in my case, I still have to clean this filter monthly. This was not designed to be easy to clean!.5. 200 line screen is equivalent to a 74 micron filter. This works wonders for clearing the pond water of flotsam. But fish slime passes right through. So you end up with fish goop all over the inside of the filter, which then gives rise to worms, bacteria, which all happily move into the filter. It's really got to be cleaned regularly to function correctly.6. This is NOT fully automatic, set and forget. Did I mention you have to clean it too?!, and yes, it was not designed to be easy to clean. It's a pita in fact7. You have to adjust the flow rates in and out to minimize washing cycles. For my setup, the washing cycles waste about 35 gallons of water each day. This means your plumbing needs to support flow rate limiting, and you'll need to have a way to constantly replenish the water for your fish as it's lost due to filter cleaning.8. Maybe other brands would be easier to deal with, but this is the only one I've ever bought, so I have nothing to compare too. It works.9. Comes with no warranty, zero, nothing. Cross your fingers.The good:1. It actually works to clear the pond water.2. The cleaning cycle is a pleasure to behold!3. This thing dropped my labor from cleaning my filter sponges every 2 days, to cleaning a drum every 3 to 4 weeks. Saves me a lot of time. But it's not cheap, and it's not easy!4. You get about 35 gallons of free fish fertilizer every day, so pair this with a big garden, and watch your plants grow! By the way, fish fertilizer stinks, so prepare yourself!

Works extremely well. Efficient. This is my second one. I run two different applications.This one was packaged very well and arrived with no damage.

Working fine. Need to do better on packaging, spray bar was broken.

Couldn't be happier. 2400 gph pump (flow valves at 70% capacity, 20 feet of 1.5inch head hight) running into 200 gallons of settling drums (no down flow seperator), 2 13watt uv lights in the drum, gravity feed to the filter, gravity feed into 2 more empty drums and back to the pond. Couldn't see the fish more than 2 inches from the surface when I only had the settling tank, within 2 weeks there is zero algae in the water column and minimal algae on the walls, and I can see individual pebbles on the bottom of the 900 gallon (30 inch high) pond as clear as if they were on the sidewalk.