Good quality ADA soil aquarium Product Description: Item Type:Aquarium Substrate Material:Gravel Color:Black Features: 1.Long fertility: with rich trace elements, this aquarium gravel has a longer life than common gravel and it is really economic. 2.Easy Method: it will never become powder and muddy water. You do not need to wash it and it can be put in the fish tank directly to be used. 3.Economic Friendly: the nutrient composition is in the gravel and can send out continuously which will not pollute the water. 4.High Stability: it can be adjustable and the size of the grain is moderate. The gravel is not decomposed easily. 5.Senior Color: mysterious solid black can make your fish tank more attractive. Aquarium decoration High purity quartz sand Fish tank aquarium landscaping bottom sand decoration ornaments white sand quartz sand fish tank fine sand small white stones Package Include: 500g sand