The smallest and finest airstone?

[shinji]

Hello,
I am looking for the airstone for diffusing CO2 in my tank by inserting it into the tube of the canister filter. Can somebody tell me the stone having a narrow diameter (less than 3/8 inch) and making the finest air coming out please? I could not find such a stone in any local stores. Thank you for your time in advance!!

 

[joy13]

I use lime wood they look like little blocks of wood with little end to connect the air hose to they seem do great. I know some people actually use broken off chop sticks instead of airstones.

 

[shinji]

Thank you

Thank you very much for a reply. I also heard about the chopsticks. Maybe I will try that . . .

 

[fort384]

I think you could also carve a limewood stone down and it would still work. You could trim to fit.

 

[Hoovercat]

I diffuse into canisters (a xp3 and a jebo 4) without any airstone. Just use the CO2 line.You can see your bubble rate that way as well.