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Reef calculator
Activated Carbon Calculator
How much activated carbon to run, and how often to swap it.
How this works
Starting rule: about a cup per 50 gallons in a reactor or a bag in strong flow. Carbon works fastest in its first few days, so steady small swaps beat one big batch left for months.
Activated Carbon
Questions
Will carbon remove trace elements?
Some. Normal amounts are fine for most reefs, especially with regular water changes.
Should I run carbon while treating fish?
No. Pull it during medication and put fresh carbon in afterwards to clear what is left.
Rather have us dial it in?
Frags2Fishes service techs test, dose and maintain reef tanks across PA, MD, DE, NJ and VA, and beyond.
