Do I need charcoal ?

Our Premium Dual Density Filter pads are designed to remove particles floating in the water. To remove odor and color from aquarium water you will need to use a good grade of activated carbon or charcoal. Here is an Amazon link to our charcoal: https://www.amazon.com/Premium-Activated-Carbon-Aquarium-Charcoal/dp/B07577R4S9/ref=sr_1_6?ie=UTF8&qid=1509827790&sr=8-6&keywords=activated+carbon+aquarium