Beautiful Aquarium OrnamentThis faithfully reproduced EBI decoration is made of polyester resin. This moss rock is finished down to the last detail so that the moss looks real. It is completely non-toxic and has no effect on the biological balance of your aquarium. The decoration is suitable for both freshwater and saltwater aquariums. In combination with the other sizes, you can imitate a rocky landscape. Features:Made of high quality polyester resin.Non-toxic and pH neutral, does not affect the biological balance.For fresh and salt waterRealistic rock with moss.