I have purchased this product and Marineland Activated Charcoal. Akurel (90 oz) and Marineland (40 oz) are about the same volume. Marineland is $18. Marineland was more profitable because, after all, carbon is smaller, weighs less, and can hold more pollutants. I regret buying this product but I'm very glad I compared it to another of its main Amazon competitors. I will buy another brand in the future.
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