Well Steve beat me too it.
But anyways here is my question and BRS answer to the questions.
How long does this media typically last?
Just a round about answer would be great.
Either per cartridge fill OR 9g jug.
Thanks!
Their answer is:
Ill say right up front, there is a TON of variables on this one. How big your skimmer is, how much air it pulls, how much co2 you have, etc. On our tank here, in the winter time we have to change a single cartridge every 2 sometimes 3 weeks. In the summer it tends to last closer to a month though.