Aquatic Experts 1.5" Large Bio Balls for Ponds - Biological Filter Media for Waterfalls & Outdoor Pond Filters, Treats Up to 1,000 Gallons (300 Count + 14" x 20" Mesh Bag)

OUTSTANDING FILTRATION! Each 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 waste keeping your aquatic friends safe. You will receive approximately 300 1-1/2-inch bioballs in a ready to use black mesh zippered bag. Just rinse and use. TOUGH AND UNIQUE! Our bio balls' spherical shape and precise spine placement permits them to pack tightly into any shape or filter type without losing surface area. Molded from high density plastic, these balls are lightweight but tough enough to keep their shape and will never degrade or wear out. Bio balls can be used loose or in the mesh bag with plastic zipper in which they are packaged. SUPERIOR TO LAVA ROCK: 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 pond bio balls' uniquely spaced spines allow most debris to pass right through them. Lava rock has tiny pores which make 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 pond balls. EASY TO CLEAN - When organic waste builds up in the bioballs, they can be gently rinsed in dechlorinated wate to remove debris and refresh the bioballs. Use our FilterFIrst, dual density bonded filter pad, or water polishing pad to capture large particles before they can be trapped in the bioballs. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.