Around 30% if this food is gone. 70% remaining

The Marineland Black Diamond Premium Activated Carbon is a high-quality filter media designed for all water types. Made in the United States by the reputable brand Marineland, this 22 oz black carbon is specifically formulated to effectively filter out impurities and harmful particles from your aquarium water. Perfect for maintaining clean and healthy water for your fish and other aquatic pets, this activated carbon provides superior filtration and clarification.