Exotic Environments Caribbean Living Reef Aquarium Ornament is made with durable poly resin material safe for use in all aquariums, Mini , 4 inch by 3-1/2 inch by 3-1/2 inch
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I bought this for my little 2 gallon aquarium. It’s perfect for that. The colors are bright, and it just looks really nice in there. The fish like to play hide and seek in the little tunnel, too.