Hailea Enviro ET-120 Silent Air Pump Blower Koi Pond Aquarium Hydroponics

Slightly louder than evolution aqua pump I had but build quality bang on

Using this product to aerate the "domestic waste" flowing through my bio septic tank. I found the replacing of the old (different type of make/model) blower with this, straightforward, but the blower that was replaced (in my opinion) was quieter. When I get within 20/25 feet of the tank it can be clearly heard working.

Not silentl very noisy

All in all a very good air pump with a really powerful output of air however it does say to keep it cool to run an air fan over it and that it has to be kept out of sunlight . It thinks for itself and will switch itself off if it starts to over heat them on again when cooled and has an alarm warning you it's over heating . All in all am very pleased with it even with the not so silent running . Hense the full five stars

Works fine but not the quietest.

Seems well made but is very noisy.

The pump is weather resistant so I keep it protected from the elements. It does get quite warm in operation and needs to be in a ventilated area. It is reasonably quiet in operation even at full air flow

Does what it it supposed to do but it’s definitely not silent. It sound like a consent buzzing noise, but it has a good air rate