- Helps reduce aquarium maintenance by keeping aquarium water crystal clear and odor free.
- Unique， mineral-rich porous stones contain natural bacteria spores that help break waste down into safer nitrates and accelerate the nitrogen cycle.
- Volcanic rock also leeches calcium and trace minerals into the water to create a healthy environment for fish.
- Works equally well in both fresh and salt water environments; also recommended for reptile and amphibian habitats.
- Small stone treats 8 to 16 gallons and medium stone treats 15 to 40 gallons; can use multiples as needed to accommodate your tank size.
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