My air stone skimmer .. air bubbles foam went down suddenly

[minajaguar]

My air stone skimmer .. air bubbles foam went down suddenly and don't know why
i am waiting for it may rise up again but nothing .. it was running good and bubbles are tiny and good ... what i have to check

 

[Bifferwine]

How often do you replace the airstone? They need to be replaced frequently because they get clogged with salt build up over time.

 

[minajaguar]

i'll try that ...

 

[minajaguar]

No ,, its still not going up as first .... i don't know what is the exact cause ...