the unit is reasonably bulky but light in weight. Due to the nature of the electromagnetic air pump there is some noise that can be reduced tensioning damping material to the case. The larger style of air pumps (40l/m or more ) seek to isolate the vibrations from the external case by anti vibration mounts but for the money this is a great value air pump.
Verified purchase: Yes | Condition: New
Good solid product which does pump out a great volume of air through the airstones which is excellent. There are anti flow back valves provided, but only 2 which is a bit absurd for a unit which has 4 outputs. Def not quiet. I have mine outside and I can hear it clearly inside the house. Would not recommend this if you have it inside and in a living space where a constant drone is not your desired ambience
Verified purchase: Yes | Condition: New
I've been using these for about 4 months now. I have 4 of them. Some people complain they are a bit loud but I've found they are quiet when set to 80-90% power and you affix tubes to all four outlets. My only quibble is that when set to about 30-40% power, they can vibrate themselves 'off' over a period of a fortnight. So you need to turn them back up every two weeks. Not a deal breaker when they cost 75% less than the equivalent pet shop products.
Verified purchase: Yes | Condition: New
This air pump is the best that i have found. It is variable speed and the last one of this type and make went for about 4 years 24/7 and only recently broke down which is amazing!!!
Verified purchase: Yes | Condition: New
Does what it says. Quite powerful. Lots of range of output adjustment. Will run 4 bubblers effortlessly even on lowest setting. Very quiet especially compared to other types that use a rotary motor rather than a vibrator.
Verified purchase: Yes | Condition: New
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