About This

• Small 1" Bio Balls for Aquariums & Small Ponds: Compact 1" balls designed for aquariums, canister filters, sumps, wet/dry systems, and small ponds. Each ball provides high surface area for beneficial bacteria to break down harmful waste.
• Choose the Correct Amount for Your Aquarium or Small Pond: Use 100 bio balls per 25 gallons in freshwater or 150 per 25 gallons in saltwater so you can buy the correct amount for your tank size. The 250 count pack in a 10" x 12" mesh bag is ideal for medium sized aquariums, sumps, and small pond filters.
• High Flow Design That Resists Clogging: Open spine structure lets debris pass through instead of getting trapped. 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. Safe for freshwater aquariums, saltwater tanks, aquaponics, and small pond filters.
• Sponge Free Core for Cleaner Water: No sponge center to trap gunk. Solid core design keeps water flowing freely for cleaner, healthier tanks. Proudly Made in the USA.