what does the charcoal do?

iceblue said:

My charcoal just sits on a shelf. I have it thier in case of an emergency such as something spilling in the water or removing meds. (Knock on wood I have never had to use meds.)

Imo you really don't need it in a tank with good biological and mechanical filtration. Routine water changes and filter pad cleanings would go a lot further then anything charcoal would do for you.

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