Petssupplies-Fish & Aquatic Pets The Marina Gravel helps you create a wonderful Aquascape in your aquarium. The epoxy coating makes the gravel inert and prevents the gravel from having any effect on water chemistry. Research shows epoxy coated gravel provides an optimum surface for the colonization of beneficial bacteria for biological filtration. The gravel comes in an array of colors and is the perfect way to enhance your aquarium., Brand Hagen, Color Black, Decorative gravel is great alone or mixed with marblesEpoxy coated; No effect on water chemistryGreat for adding character and color to your aquariumGravel helps hold plants and ornaments in placeBlack colored gravel, great for adding color to your aquarium
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