Tanks for Ego's lifespan?

[thall12]

Is there a relative lifespan to the tank cartridges for the Ego- C? If there is how long is it?, or how do I know when to replace?
Thank you.

 

[madjack]

...the lifespan is as long as it lasts...when to replace is when you get tired of them leaking on ya.........

 

[Toronnah]

...the lifespan is as long as it lasts...when to replace is when you get tired of them leaking on ya.........

He has a "C", not a " T"


I would imagine it should last a month if used exclusively.