Having 3 containers all connected together its kinda hard to know when the bubbling slows down in the tank, i would prefer that it never slows down, thats kinda the point i am trying to have 3 co2 bottles.. i just figured maybe i could just change the 2l's, once every other week...
week 1, 2l #1
week 2, 2l #2
week 3, 2l #1
week 4, 2l #2
I donno, but its been my oppinion that the DIY co2 in the 2l doesnt last for more than 2 weeks, so that even if its not totaly done its thing it woudlo be a good time to change it regardless.