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Well i just wanted to get every ones thoughts on how much carbon should be run.I have a 210 gallon with a 70 gallon sump ( 230 total gallons ).It is a fowlr aggressive.The carbon is changed once a month and is run in a bag through passive filtration.I was thinking 1.5 cups per 100 gallons each month.What do you think?
 

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Good question. I'll wait for a good answer from someone with experience.

IMO when I had an issue with a FW tank though, in an emergency I've used... 1.5lbs in my 120 Gal, through a Rena XP3.
 
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