The Nature’s Footprint Worm Factory Refill Kit is a great way to keep your aquarium clean and healthy. This kit includes 32 ounces of Nature’s Footprint glacial rock dust, 8 cups of Nature’s Footprint pumice, and 2 pounds of coconut coir. The glacial rock dust is easy to add to your aquarium and will help to absorb harmful toxins that may be present in your water. The pumice provides a safe and comfortable environment for your fish and will help to absorb toxins. The coconut coir is a natural product that can be used safely in your aquarium.