Bio-Glass is made from natural silicate fused at a high temperature. Its pore structure is similar to that of loose soil, making it optimal for the colonization and growth of microorganisms. Its porous structure gives it up to 8 times more surface area, compared to other bio-rings. Great for a wide variety of filtration systems like submersible, canister, wet-dry, and power filters. For fresh or saltwater aquariums.
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