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I just read from someone (unnamed) that putting the carbon or charcoal that comes with most filters will actually take out your dosing column??? Is this true???
 

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Yes. Carbon also only lasts 2-3 weeks before it loses it's effectiveness. Use it after dosing medications to remove it or to remove tannis from the water.

Lots of people use Purigen which keeps the water pretty clear. :D
 
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