Zacro Aquarium Air Pump - Ultra Silent Oxygen Pump with Dual Outlet Adjustable Air Valve, Air Volume 2 * 5L/min 6 W, Up to 130 Gallon Tank

Second one I bought now. Extremely quiet but so powerful it makes any bubbles on a lower height tank, quite loud! Easy to unpack, set up and get going. Few accessories come with like airlinev& stones. Minimal maintenance. Power is excellent. Durable as I’ve split the lines at least 2-3x and no hassle. Airline that comes with is the soft bendy one so no good for me but excellent air pump. The functional use of such a straight forward pump is great. No fancy lcd screen or anything, just pump clean air and be quiet. Is quite tall but hides easily amongst cupboards, units etc. wipe down to remove dust and that’s it. Knob to adjust speed and vary a lot which I like. I keep maxed but if I need to turn off or reduce during tank maintenance, I can. Will buy a 3rd and 4th for my other tanks. Not needed to do any maintenance after 6 months so far

My 7 year old air pump in my 200 litre aquarium recently gave up the ghost. It was still making the monotonous sound it's been making for all those years, but virtually no air was arriving in to the tank, so it was time to look for a new one.From personal experience, I don't believe the claims of "ultra silent" or similar on air pumps. My definition of silent and those of the manufacturers of them differ greatly. Something I can hear from the other end of the living room over the sound of the TV is not silent. As such I took the Zacro's claim with a pinch of salt. What drew me to it, though, was the dual outlet. On my old setup I had a single outlet and a single non-return valve (NRV) which then had a splitter and two pipelines heading into my tank. It worked but it wasn't pretty. I thought I'd give this product a punt, even though it was one of the more expensive ones available on Amazon.The pump is a solid beast. It's a heavy lump and it feels reassuringly well built. And I can testify how well built it is because I wasn't in when it was delivered, but watched in awe from my home security cameras as the delivery driver "handed it to resident" by dropping it over my 6ft side gate into a puddle. I wouldn't have held it against the Zacro if it was totally destroyed, but fair play to it it took the beating and kept on going.Installation is straightforward. It comes with 2 metres of pipeline, 2 airstones and 2 NRVs which will get you feeding air to your tank in no time. My one criticism of the whole package would be that the pipeline was a bit short. 2 metres isn't really very much, when you consider that's for two airstones which are likely to be at opposite ends of your tank. A pump like this is really only going to be on a decent sized tank, and likely to be housed in the cabinet underneath, so have a think about it and work out if 2 metres is really enough for you. I suspect not. I needed more than twice that. There's a dial on the top which will allow you to control the flow of air to set to your preferred intensity.When I switched it on for the first time I was expecting quite a noise given the size of it, but I was pleasantly suprised. It's not silent, not in anyway, shape or form, but it is the quietest pump I've used. It had four pointed rubber feet that do a good job of prevent vibrations turning your tank into a big subwoofer, and the sound is kept to a tolerable minimum. You can hear it easily enough through a closed cabinet door, but it is an acceptable level. Just don't be upset that it doesn't meet the "ultra silent" claim. None of them do.Overall, I'm very happy with my purchase. It's been in the tank now for nearly a month and has performed flawlessly.

Very good for the price, best thing is that it is quiet, the air stones with it are also of a good quality, a good buy

Very powerful and very quiet

Nice and quiet like you can change the flow rate on pump it self

The media could not be loaded. I bought this item due to the metal parts theoretically lasting longer and the comments on noise. I was so pleasantly surprised - this air pump is big, but it's fantastic. It's quieter than my old eheim, and running at low strength (still more than enough for my 100L) it's quieter than the fridge. In the video attached, you can hear the fridge not the filter, and I'm right up against the tank. I have it hooked up to an air stone and a matten filter and it's absolutely perfect. I don't normally leave reviews, but I am so happy with this purchase. I will update if/when it dies, or needs repair work.

Great pump, really quiet on the lower setting and pretty good wide open. Good price for what appears to be a good quality item and quick delivery.

SO much quieter than the one it replaced