Orlushy DC-4000 Silent Swirl Controllable DC aquarium Pump 25W 1050GPH-marine wavemaker return pump with sine wave Controller for salt/Freshwater coral reef fish tank sump Circulation

I have three of these in different ratings. The DC-12000 is powering my main-floor tank/basement sump. I'm pushing a 11' head running it at level 11 of 21. It starts moving water at level 2. I have smaller model running my 120 with a sump under tank for 3 years now -- rock solid even though I neglected maintaining it. It's also super quiet without problems with vibration or any special measures to quiet it. I have a third one in my basement mix tank pushing 14' head when am filling tanks upstairs through a sediment filter. I am thrilled with the quality and value of these pumps. At the price, I'll probably just rotate new ones in every 3 years for piece of mind. (Every mechnical device will fail at some point, and gear always seems to fail when you aren't home.)

It works well on my 120 gallon aquarium, and has lasted quite well, even when I get lax about watching the water level in my 30 gallon sump tank and it gets to a low level.

i love this pump!!! My return pump for my 215 gallon saltwater tank had crapped out. This pump is great for the price and even has a control panel with it that works great. adjustable flow options and a feeding mode. i love the quality of this pump and has been working for a few days with no hiccups. highly recommend!!!

Solid feeling, nice looking pump and it makes way more sense to submerge a 24v unit than 110/240v! Nice long power and controller cords. Controller retains settings after a power shutoff though multiple people responded saying it doesn’t. It doesn’t have a power switch! Aggravating but not a deal killer. Barbed fitting sizes are a little clunky but with some warm water got them to work with my 3/4 and 1/2 inch vinyl tubing. I’m only using inline and it runs ultra quietly unless you have some air in there. While testing I ran it dry and upon restoring ample head to supply bucket it was noisy and pumping rate quite reduced. It took a little messing around to get all the air out of impeller housing and back to pumping quietly at normal rate. I bought this for a hydroponic setup because current pump is submersible only and under powered and all indications are this will be fine for my application. From reading numerous probably unfair negative reviews on a variety of pumps is clear that people don’t understand the concept of head and flow and it is ridiculous that sellers don’t include pump curves in the description. In short, if a pump is described as for example 1,000 max gph and 10 ft max head that means at zero head (impossible to achieve) it will pump 1000 gph and at 10ft head it will pump zero! A pump curve tells you all the in-between points. It isn’t a linear function. Also, 1 ft of head creates 0.433 psi and every fitting, inch of tubing and even bend of tubing consumes head and if tubing is small head is consumed even faster and you’ll never get the performance you expect even if seller is telling the truth so figure out what you need then buy at least one step bigger pump than you think you need.

The negatives (only a few but not bad): 1). There should be a 90 degree angle input option that can be screwed on so that it can work in lower water levels. 2). The remote should have an on/off, not just a 10 minute "feed" shutoff option. I ended up buying https://www.amazon.com/gp/product/B01FT4RBBM/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 to turn the pump on and off. 3) One set of plugs is not screw in, and they tend to fall out or get pulled out and of course the pump won't work. 4) I make fountains and I know there are many people who will use these for other than fishtanks. So perhaps the word "FEED" can be replaced by the word "PAUSE" so that people can use it on fountains, in water walls and other places besides fishtanks. As I said, these are mainly all minor... This is a really great pump. The positives: It's great! It's so quiet. Even on the level 20. I like that it goes up 20 levels. Many pumps go up to 3, 5, 10. It pumps the amount that they said it does. I also like that it's white and black, which matches the fountains I produce. The connection design and the pieces that go with them are good, strong and solid. I have tried mostly every pump on Amazon. This is clearly top for me and I plan to buy more. I plan to buy many more.

I used this pump for a very unconventional dual-tank setup. The pump pulls the water out of a 55G African cichlid tank before moving it through a bunch of moving media and up around 7’ to the top of another 40G heavily planted shrimp tank. The plants and shrimp handle all the waste from the cichlids because they will eat everything in their tank. I usually keep the pump at level 10/20, but I love having the ability to adjust the flow in small increments right from the control panel. This thing has been cranking for about 2 years now nonstop and shows no signs of failure. Its also extremely quiet. I withheld my review on this for a long time, because I feel that longevity and reliability are pretty much the most important things. Any pump can shoot a bunch of water for a little while, but 2 years of pumping dirty water with no problems is worthy of a 5 star review.

Absolut junk, do not buy this!!! Had it for 5 months in use, just randomly stops working. I run 2 part at correct doses, been doing reef tanks for 20+ years own a coral farm so I'm not new to this. 8 other pumps in the system and this is the only pump caked up in minerals!!!! the impeller magnet is so close to the housing that mineralization grinds into the magnet and stops it from turning. took it apart and cleaned it smooth, still seizing up at least once a week usually over night when most critical that it runs while the autodose is adding chems. Took a chance on a cheap pump, will never do it again. I own 2 other pumps about the same size 5+years in use, never needed to be serviced cost 300 each.

Great quality shame no app

This is the best pump I have used, it is super silent, I have to check the output to make sure its running, installed it yesterday only, will update incase of anything

I used this pump for almost a month now, it is so quiet compared with the 2 other pumps I have purchased before, even those 2 other pumps were also advertised they are quiet products. I have a 200-gallon fish tank set up in my living room, the sump pump is below my fish tank inside the cabinet. The environment is really quiet. After I use this DC-4000 pump, I can't even hear the pump is working, all I can hear is the water running. When I first install it, the pump was set to pulse pumping mode, without the user manual, I can not figure out how to change it to the proper setting. Those setting does not make sense by just look at the controller display. After I read the manual and programmed it to the setting I want, it works perfectly. From time to time, I turn off the power to do the water change, the setting will remain after I power it back on. Overall, just need to read the manual, program to the setting you want, then it works perfectly. I totally recommend it to other users.

Ok, so I'm setting up a additional propagation system and am trying to do it on the cheap. I had very mixed thoughts about this pump, especially given the very mixed reviews. Ordered one to test given the price to flow rate. Here's where I'm at. The initial pump I ordered has been running about about a month no issues. I've since ordered two more. All are running and consistent in performance. I am using them in an IN-SUMP configuration so I can't comment as to the leaking issue others are have mentioned but the overall build quality is surprisingly good. If they are leaking I would imagine it would be slow and likely a crushed or out of place gasket imo. (Straight up guessing) Cons: Flow rate is definitely not "as advertised" I'd say best guess 2750GPH full flow rate. They do not handle head pressure well at all. Take at least an 7-10% performance hit for every 1' of head pressure. I think it's related to a slightly undersized propeller design within the housing. The flow rate is pretty consistent but can go through periods of momentary variations. Small, but enough to notice if you're looking for it. The included intake guard is pretty thin and flimsy, it seems to be holding up but I'd expect to see chunks breaking off within the year. I think that's about it on the negative side. Pros: The inclusion of two full sets of multiple fittings is and multiple gaskets is a nice touch. (An extra housing gasket as well would be even nicer...) The wiring and connectors are solid. The controller is small enough and simple enough. Nothing fancy but variable speed with 20 steps in two modes. Makes fine tuning flow easier. Haven't tested and don't care about the variable whatever pressure mode so I can't comment to it's effectiveness I just care about steady flow which this pump achieves. Oh and dead silent operation, like impressively silent. Also the price... Even at the more realistic flow rate, there is nothing I could find that compared to this pump price to performance. Assuming their customer service is as good as others have said in the comments should I run into issues I'm totally sold on these. It's cheaper to just buy an extra to have on hand at all times then to run multiples of any other return pumps I saw. I will of course update this down the road should anything change.

Works well