1. Biochemical Balls are available in three sizes: 20 mm, 32 mm, and 42 mm.
2. Absolutely safe: This product series is clean, poison-free, odorless, and insoluble in water.
3. Environmentally sound: The Biochemical Series can be used for six months without having to be replaced.
4. Multipurpose: The Biochemical Series can be used in many different kinds of filtering systems, and is acid proof, alkaline-resistant, and suitable for use in salt water.
5. Functions: This series increases the time water and air are in contact which increases the amount of oxygen in the water, and encourages more bacteria growth. This series is smooth and not porous; there is no need to wash off the layers that form on the outer surface, a new one will form on top.
