• Green Vista Jumbo 1.5 Inch Diameter Bio Balls / Bio-balls feature an extremely high surface area for beneficial bacteria to colonize.
• Long-lasting, Green Vista Bio-balls do not have to be replaced! This package contains about 700 pieces of 1.5-inch diameter Bio-balls.
• Bio-balls are a far better option for bio media than lava rock. They also weigh much less than lava rock, making them easier to handle.
• These Bio-balls come with Hydro-Bugs Beneficial Bacteria jump start for biofilters. The beneficial bacteria work with the Bio-balls to filter and clean water features.