Clarify your water naturally using Bio-Balls to grow "good" bacteria, Bio-Balls help water clear. They form to any shape container and are hard so they will not compact. Bio-Balls are extremely easy to clean and will last forever! 1.5" in diameter. Use 200-600 Bio-Balls per media bag depending on fish load.

Buy More and Save! 2 or more 200 Count = $34.99 each