BRS Bulk Bioballs are made of high density polypropylene and are used for filtration. Pegged surface has tons of surface area for the growth of bacteria. Promotes gas exchange and increases oxygen level in your tank.

• Black
• 1.5" diameter
• Approximately 80 Bioballs per gallon
• Surface area is on average 22.7328 inches per bioball

More Features:

• Will not clog with organic matter.
• Totally inert and non-leaching.
• Safe for use in fresh or saltwater aquariums.
• Cultivates nitrifying bacteria.
• Use in biological filters and gas exchange reactors
• Made in the USA