Things You'll Need
Instructions
Select carbon with a low ash, iodine and molasses number. Carbon with a large surface area (larger pieces) will last longer and be more effective in removing contaminants from the water.
Measure three ounces of carbon for each 10 gallons of tank capacity.
Soak the carbon in plain, non-chlorinated water for 20 minutes and rinse thoroughly.
Place the carbon into the mesh bag and tie off.
Add the mesh bag to the filter's reservoir where water will pass over it.