*Made of the polyurethane foam,durable,non-toxic,no element leak out,no influence on the PH level of the water.*All the paints are made of the environment friendly materials.No dissolve in the water,s

1.Material:polyurethane foam,durable,non-toxic,no element leak out,no influence on the PH level of the water.2.All the paints of the boards are made of the environment friendly materials.No dissolve i

1.Material:polyurethane foam,durable,non-toxic,no element leak out,no influence on the PH level of the water.2.All the paints of the boards are made of the environment friendly materials.No dissolve i

1.Material:PU(sink in water),polyester resin.Durable,non-toxic,no element leak out,no influence on the PH level of the water. 2.All the paints of the corals are made of the environment friendly materi

Good for water plants growth and safe to fishes. Made of natural soil,organic manure,mineralsubstance,adhesive,paint and buffer The pellet size of the soil are made into moderate,so they stay under th