do you know that fish pump also..........

[kopirui]

do you know that fish pump also have mini air filter?
discover my air pump get smaller and smaller output.
decide to open up and see what is inside the pump.
the rubber and motor is working fine.

next question come into my mind.
if the air pump is fully seal, where does the pump produce its output air from?

found a small cap below the pump.
open up and found a very dirty black filter is the chocking cause.

 

[zookeeper]

found a small cap below the pump.
open up and found a very dirty black filter is the chocking cause.

No filter. It should be a one-way valve.
Dirty because of static electricity caused by air moving through and dust stick to it, just like your normal fan.

 

[kopirui]

No filter. It should be a one-way valve.
Dirty because of static electricity caused by air moving through and dust stick to it, just like your normal fan.

cant be.then where does the pump get it input air to generate its output?