Our activated carbon is made of coconut shell charcoal, and itis safe and non-toxic. it can remove the harmful substance, odor, heavy metal,purify the fish tank water, and improve the water quality.Features:Strong absorption: it can strongly absorb certain harmfulsubstance to achieve the removal efficiency.Multipurpose use: it can remove the harmful substance, odor, heavymetal, purify the fish tank water and improve the water quality.Designed with the net bag: comes with the net bag, which makeit easy to purify the fish tank water.High quality: made of the coconut shell charcoal, safe, non-toxicand strong absorption.Healthy environment for fish: the activated carbon ensure thewater quality and provides the good environment for your fish.Specifications:Condition: 100% Brand NewMaterial: Activated CarbonColor: BlackStyle:3 Net Bags, 7 Net Bags(Optional)Weight: approx. 167~377g/ 5.89~13.29ozPackage List:1* Activate CarbonNote:1. Please allow 0-2cm error due to themanual measurement. Thanks for your understanding.2. Monitors are not calibrated same,item color displayed in photos may be showing slightly different from the realobject. Please take the real one as standard.