Did My Air Pump Degrade In Efficiency?

[Boris_yo]

Good day. I think my air pump degraded in efficiency because it initially it pulled air bubbles from both sides (of airstone?) and now it is from left side. Today after cleaning aquarium, it even pulled air bubbles intermittently. My air pump was always set on its highest power by the way and when I tried setting it on low, no air was coming out. Here's the video:
 
https/www.youtube.com/watch?v=5KagXYnBM2Q

 

[KirkyArcher]

Perhaps it's the airstone that's become clogged up try removing the air stone and just putting the tube under water, but most likely the diaphragm in the air pump has split. Usually spares are available depending on the manufacturer

 

[Boris_yo]

Seems like air supply gets better as I put tube closer to surface.
 
Tube without airstone:
 
http/youtu.be/fsfnwyhQm_Y
 
Tube with airstone
 
http/youtu.be/kGJ3jXlRJfU

 

[KirkyArcher]

It's still very poor, if it's not the diaphragm it may be a kinked airline, or flow restrictor tightened down too much

 

[Boris_yo]

It's still very poor, if it's not the diaphragm it may be a kinked airline, or flow restrictor tightened down too much

 
In the air pump block at air-out where green pipe starts, initially the fraction of pipe was a little darkened but now the coverage expanded further on pipe. Seems weird a bit.

 

[Donya]

Since this topic is fish-related, I'm going to move it over to Tropical Discussion.
 
Another thing worth checking: many air pumps also have a filter over the air intake. If that gets clogged or too dirty, it can drastically reduce the output and produce the symptoms described.

 

[Boris_yo]

This is the air pump I have and I have not noticed any air intake vent, let alone filter. Maybe I need to disassemble air pump?
 

 
By the way, pay attention to left dark tube since it was green initially.