Material: Stone Color: Blue, Black, Red, Green , Yelllow Size: 15*25 mm Suitable Air Tube ID : 4 mm(3/16’) weight70g Quantity: 10Pcs Please note : air pump and air tube are not included SAFE AND HEALTHY ENVIRONMENT: This air stone for hydroponics is made of silicon carbide, which has no effect on the growth of fish and hydroponics, but also promotes it. MULTIPLE COLORS: Not only can it play a role in increasing oxygen, but you can also choose the color to match the fish tank decoration to make the fish tank more eye-catching. LONG USE TIME: Soaking the air stone in water for one hour before use. Brush the stone surface every 2 weeks, you will find that he can accompany you for a long time and save a lot of money.
