Jebao OW 10 25 40 50 Wave Maker Pump with Controller&Magnet Mount for Coral Reef Marine Aquarium Fish Tank (OW-25)

I got my 2 jebao OW-25 wavemakers plus controllers. Initial impression is that they are awesome! Time will tell if they stay great, but for now I couldn’t be happier. These little guys move a lot of water and are basically silent. The magnet holds them quite firm, no problems with mounting. The controller is rather basic but has a bunch of functions. Despite the different settings, only one or too seem useful, but that’s ok because I can get a really nice wave going. Realistically, I could have gone with the next size up but that one wouldn’t have shipped for a while so I went with these. Either way, 2 OW-25’s does a fine job of moving water in a 90 gallon 4 foot long tank. I actually was able to replace 4 old powerheads and have more flow with just these two! If I fine tune the pumps to create a perfectly timed wave I have too turn the pump power down to keep it from splashing over the top of the tank. I personally like a ton of flow, so rather than a perfect wave I tuned it for maximum flow with a more random wave to keep it from splashing over. You can tinker with the frequency of the pulses on the different settings until you get something you like. I really can’t imagine needing more than what these offer which is why I’m not sure I can justify a more expensive brand. The only thing I can’t comment on is how long these will last, which is the only reason I think you could justify a pricey brand name powerhead, and honestly, I’ve had expensive equipment die prematurely too. If you need a wavemaker and don’t want t spend a small fortune these are a good choice.

strong magnet on outside of tankstrong magnet on inside of tankrubber connectors hold the pump onto the inside magnet (I've accidently pulled it off when grabbing the pump, they went right back on) ** this is what keeps noise down to... nothing(?)I have a 135gallon display, I put this pump on the side blowing a bit towards the back. at first I though it was to strong for my tank, so I turned it down.It was only because it was new that the fish didn't like it. they seem to enjoy the randomness of it now. I turned it back up to about 8. leave it on random with the light timer on it, so it goes down to steady low when the lights go out.I think when I get some more $$ I'll get another one and put it on the other side so they can both blow towards the center and make interesting currents in the middle.

I bought this pump for my aquarium. was thinking it was a bit undersized but once i plugged it in and set the pulse mode. i was super happy, i even removed my other 2 korallia pumps since everything rocked back and forth perfectly. super happy with pump and very quiet.

As others have mentioned, no instructions in English were included. Manufacturer doesn't even have English instructions on its website, obviously product is not aimed at English speaking audiences. Must be placed at least 6" from the surface or more or a vortex forms and the unit makes a racket. Of course, you need to discover this by trial and error. The control unit is complex enough that it's a nightmare without instructions. I cannot recommend this unit.