Feature:<br />-High quality biochemical ball， the is much， strengthen the effect of filtering bacteria， can be combined with other filter materials， to achieve a better filtering effect<br />-Large surface area， you can break down the poison， make up the space.<br />-Biochemical cotton， high efficiency and high quality biochemical cotton filter element， more effective propagation of bacteria.<br />-High Xiaopei bacteria， make up the deficiency of the filtering space， increase the oxygen content in water.<br />-Suitable for the aquaculture in freshwater and seawater.<br /><br />Specifications:<br />1.Product name: Bacteria Culture Ball<br />2.Material: Plastic<br />3.Color: Black<br />4.Size: Approx. 16mm/0.62&amp;quot;<br />5.Quantity: 50pcs<br />6.Weight:100g<br /><br />Package Include:<br />50x Bacteria Culture Balls