Does a Loud Filter Bother Fish?

Noise from loud music, TV, etc can stress fish. These sorts of noise should be avoided.

Do noise filters bother fish?

Several studies on fishes have shown that behaviour and auditory sensitivity are often affected by underwater noise. ... Noise spectra showed that all aquarium filters measured created a high amount of low-frequency noise, while the water outflow above the surface created additional high-frequency noise components.

Is my filter too loud for my fish?

Most of the time the filter is not the culprit when it comes to aquarium noise. Generally the problem is with the air pump, but sometimes the filter itself can cause excessive noise if it is not running properly. Anything inside the filter can get dirty or damaged or be out of place, resulting in more noise than usual.