Under 40 dB, which is quieter than the room.
Under forty decibels is quieter than a normal conversation, which matters because an aquarium air pump runs continuously and most of them end up in a room somebody sleeps in.
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Size: Single outlet
Why you'll love it
A buzzing pump on a shelf gets switched off at bedtime and forgotten by morning. Under 40 dB with rubber feet is the difference between a pump that runs and one that sits in a drawer.
The four outlet model can run two sponge filters, an air stone and an ornament at once, each dialled separately. Splitting one un valved outlet just starves whichever line is furthest away.
We checked the electrical spec on every pump in this range and most were 110 V or unstated. This one is explicitly 220 to 240 V at 50 Hz, which is what a UK socket delivers.
Good fit if
Look elsewhere if
Oxygen enters water at the surface, where it meets air. Bubbles rising through the water column exchange very little gas on the way up; what they do is disturb the surface when they break, and that agitation is where the exchange actually happens. So a pump is oxygenating the tank indirectly.
It also drives air powered sponge filters, which need nothing but rising bubbles to pull water through a sponge. That makes them the right filtration for fry, shrimp and betta tanks, where an impeller would injure small animals and the current from a powered filter is more than the fish want.
Most air pump noise is not the pump; it is vibration transmitted into whatever it is standing on. A pump on a glass cabinet or a hollow shelf turns that surface into a soundboard, and the same unit on a folded towel is often barely audible. Multi stage internal damping addresses the rest.
A rattle that has developed over time usually means the diaphragm is tiring or the unit has worked itself against a wall. Check the standing surface first before assuming the pump is failing, since it is the cheapest thing to fix and it is the cause more often than not.
Choose the outlet count on how many air driven devices you have rather than on tank size. One outlet suits a single sponge filter or air stone; two covers a filter and a decorative bubble bar; four is for running several tanks from one unit, which is common in a fish room.
Individual flow valves matter because they let you turn one line down without throttling the pump itself. Restricting the pump to reduce bubbles makes it work against back pressure, which shortens its life. Bleeding the excess off with a valve is the correct way to do it.
In the box
How it works
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The details
| Version | Outlets | Best for |
|---|---|---|
| Single | 1 | One sponge filter or air stone in a single tank |
| Double | 2 | A filter plus a bubble bar, or two small tanks |
| Four | 4 | Several tanks, or a fry and quarantine setup |
Choose on the number of air driven devices, not on tank volume. Unused outlets should be capped or valved shut so pressure is not lost through them.
Loved by real pet parents
The tank is in the living room and the old pump was the reason we kept switching it off at night. This one sits on its rubber feet and I genuinely cannot hear it from the sofa. Under 40 dB is not a marketing line, it really is below the level of the room.
I have two sponge filters, an air stone and a bubbling ornament, and I was running two pumps to manage it. The four outlet version does the lot from one plug with a valve on each, so nothing is starved. The furthest line no longer sits there doing nothing.
Straight out of the box it sat on a glass shelf and the whole shelf hummed along with it. Put it on a folded towel and the noise vanished completely. The rubber feet are good but they cannot fix a shelf that wants to resonate.
Half the pumps I looked at were either 110 V or said nothing at all about it. This is clearly marked 220 to 240 V at 50 Hz, which is what comes out of the wall here. Plugged in, works, nothing extra hanging off the back.
Output is strong and it really is quiet, no argument there. The little valves on the four outlet model are stiff enough that I need both hands and a firm grip to move them, and one now sits slightly off where I want it. Everything else has been fine since spring.
I have a 35 cm bubble bar that my previous pump could only fill from one end. This one runs the full length evenly and still has a second outlet spare. For 5 W that is a decent amount of air moving.
The base is 165 by 100 mm, which is bigger than the little pump it replaced and more than I had allowed for in the cabinet. Once I rearranged things it is fine and I would not go back. Very quiet, very steady.
The tank is in our bedroom and the last pump moved out to the hall within a week. This one has stayed put since November because you simply do not hear it once the light is off. That is the entire reason I bought it.
The double outlet model runs a sponge filter in each tank and the valves let me dial them separately, which matters because one tank is much smaller. Freed up a socket and one less thing on the timer board. Steady since December.
Good questions
The pump is rated 220 to 240 V at 50 Hz, which is correct for UK mains. We are confirming the fitted plug type with the supplier. If a two pin European plug is supplied you will need a standard travel adapter, and we will say so on this page once confirmed.
One outlet per air driven device. A single sponge filter needs one; a sponge filter plus an air stone needs two. Buy one size up if you expect to add a second tank.
Yes, and it is worth the pound it costs. If the pump sits below the water line and the power goes off, water siphons back down the airline into the pump without one.
It is specified at 220 to 240 V, 50 Hz, which is UK mains. Check the plug type on arrival and use a proper adapter rather than anything improvised if one is needed.
One per air driven device. A single sponge filter needs one outlet; a filter and a bubble bar need two. Cap or valve off anything unused.
If the pump sits below the water line, yes. Without one, a power cut lets water siphon back down the airline into the pump and ruin it.
Last reviewed 30 August 2026
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