Aquarium Bio-Balls

Improve the quality of life for your fish and coral by cultivating beneficial bacteria with these Polypropylene Bio-Balls! They take part in the exchange of gases and increases the dissolving of oxygen.  Features: Simply Rinse and Use Bacteria friendly Polypropylene Construction Dense Hole Structure for Nitro-bacteria For use with Wet / Dry filters etc. to improve biological filtration Perfect for Freshwater and Saltwater Fish Tank, Mini-reef Aquarium or Ponds. Great for hatcheries, tropical fish farms, koi ponds, waste water systems, cooling towers, and other commercial & industrial systems. Easy Maintenance Package Content: 40pc of 1.2" Aquarium Bio-balls