Large 1.5" Bio Balls for Ponds & Waterfalls: Oversized 1.5" balls designed for pond filters, waterfalls, and high flow outdoor systems. Each ball provides nearly 2 sq. ft. of surface area for beneficial bacteria to break down waste.
High Flow, Low Maintenance Design: Open spine structure lets debris pass through instead of clogging. Unlike lava rock, these bio balls maintain performance and rarely need cleaning.
Durable, Long Lasting, and Safe: Made from 100% polypropylene that won’t degrade. Ideal for koi ponds, freshwater ponds, aquaponics, and large aquarium sumps. Use loose or in a bag.
Sponge Free Core for Cleaner Water: No sponge center to trap gunk. Solid core design keeps water flowing freely for cleaner, healthier ponds. Proudly Made in the USA.