Review on Filter Coconut Granular Activated Charcoal by Sam Davenport

Great product for my large aquarium filter, needs about a pound of carbon every 3-6 months so I'm glad I found this. Update: A month later Terrible for my Magnum 350 filter. End up camping. The fish was a week without a filter. I dismantled the filter box and coal flowed like sand into the impeller. Oops it might cost me $80 for parts to mount the impeller as everything is chewed up and the filter box collapsed so I already spent $10 on it. Ouch