Each of our aquarium bio balls is covered in spines to dramatically increase the surface area of each ball to nearly 2 square feet providing space for a massive number of beneficial bacteria to colonize. These good bacteria break down harmful organic waste keeping your aquatic friends safe. You will receive approximately 100 1-1/2-inch aquarium filter balls in a mesh bag. Just rinse and use. Our bio ball filter media's spherical shape and precise spine placement permit them to pack tightly into any shape or filter type without losing surface area. Molded from high-density plastic， these bio balls for fish tank are lightweight but tough enough to keep their shape and will never degrade or wear out. They can be used loosely or in a plastic zipper mesh bag. The balls are 100% polypropylene making them a safe， reliable biological filtration media for fresh and saltwater. They are manufactured for use in koi and water garden ponds， freshwater fish tanks， saltwater aquariums， aquaponics， fish hatcheries and much more. Over time， porous lava rock becomes clogged with debris decreasing its surface area so that its ability to house and grow good beneficial bacteria plummets. Our aquarium filter balls' uniquely spaced spines allow most debris to pass through them. Lava rock has tiny pores， making it difficult to clean， while bio balls in most applications never need cleaning. A bag of wet lava rock is many times heavier than our bio balls for pond filter. Your purchase comes with a full 90-day， no-risk， no-nonsense 100% money back Guarantee. Either you're thrilled， or we don't want your money!

Aquatic Experts - Aquarium Bio Balls， Freshwater Filter Media for Aquarium and Ponds， 100 Count， 1.5''

• OUTSTANDING FILTRATION! Each aquarium bio ball is covered in spines to dramatically increase the surface area of each ball to nearly 2 square feet providing space for a massive number of beneficial bacteria to colonize. These good bacteria break down harmful organic waste keeping your aquatic friends safe. You will receive approximately 100 1-1/2-inch aquarium filter balls in a mesh bag. Just rinse and use.
• TOUGH AND UNIQUE! Our bio balls' for pond filter spherical shape and precise spine placement permit them to pack tightly into any shape or filter type without losing surface area. Molded from high-density plastic， these bio ball filter media are lightweight but tough enough to keep their shape and will never degrade or wear out. The bio balls for fish tank can be used loosely or in a plastic zipper mesh bag.
• TRUSTED! Our bio balls for pond filter are 100% polypropylene making them a safe， reliable biological filtration media for fresh and saltwater. They are manufactured for use in koi and water garden ponds， freshwater fish tanks， saltwater aquariums， aquaponics， fish hatcheries， and much more.
• SUPERIOR TO LAVA ROCK: Over time， porous lava rock becomes clogged with d debris decreasing its surface area so that it can house and grow good beneficial bacteria plummets. Our freshwater filter medias' uniquely spaced spines allow most debris to pass through them. Lava rock has tiny pores， making it difficult to clean， while aquarium bio balls in most applications never need cleaning. A bag of wet lava rock is many times heavier than our bio balls.
• RISK-FREE! Does this come with a money-back guarantee? YES! Your purchase comes with a full 90-day， no-risk， no-nonsense 100% Money Back Guarantee. Either you're thrilled， or we don't want your money!