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50 Gallons or Less & Complete Kits
Hagen HG20565
6.6 Lbs Biological Filter Media
Your Price: $18.28

Detailed Description

Because of its large porous surface area, Lava Rock is an ideal host for large populations of beneficial bacteria. Placed in the appropriate pond filter media chamber, Lava Rock encourages the growth of beneficial bacteria that are essential for biologically filtering harmful toxins and creating the conditions for clean and clear pond water. The filter media is also suitable for most underwater pond filters.