Sinking Bio-Balls Biological Filter Media - Approximately 300 Pieces
Sinking Bio-Balls are designed to house and grow enormous colonies of ammonia and nitrite consuming bacteria. Add directly to your biological filter, surface skimmer or waterfall filter and dramatically increase the usable surface area and efficiency of your system. Our dependable Bio Balls are professionally engineered to optimize surface area while providing maximum oxygenation.
These sinking bio-balls are an excellent choice for DIY filters, especially modified pool / sand filters because they are a great substitute for filter sand.