SUNSUN HW-302 O RING

The Bio Balls were fired by high temperature. 2, Full of rich variety of natural elements and essential minerals and trace elements. 3, PH Neutral. Great help to restore the natural water quality, and provide the most suitable living environment for your fishes. 4, suitable for fresh water and sea water tank. 5, Do not often change these balls. After six month used, change half of them and use new balls with the rest old balls. Attention: 1, After transportation, the bio balls may have ceramic dust on surface. Please understand it. 2, The new bio balls should be washed with fresh water before usage and then you had better put them in boiling water for 20 minutes. 2, After using the balls in fish tank , if the balls need to be washed , wash it with aquarium water , do not use tap or boiled water