Optimize biological filtration in your aquarium system. Versatile, space-saving Bio-Balls efficiently process more harmful organic materials. The secret is their unique, geometric design that dramatically increases surface area to cultivate more beneficial bacteria. One gallon of Bio-Balls has a surface area of approximately 21-1/2 square feet. Safely maintain larger biological loads even in aquariums with relatively smaller filter areas. Place in wet/dry filters to improve biological filtration. Each Bio-Ball measures approximately 1 inch. Use one gallon per 45 to 60 gallons of water.
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