Disc Ponds Reservoirs Air Pump Accessories Aerator Bubble Diffuser 13cm.with a small air outlet can release fine and dense bubbles, a great accessory to properly aerate a home aquarium/medium fish tank.The Air pump stone disc is made of high quality sand material and sintered at a high temperature, which is sturdy, and durable.Standard ID airline tubing: 0.16inch/ 4mm, suit for most fish tanks.Soak the stone completely in water for 30 minute before use, and clean it regularly with a brush.disc great for growth systems, ponds, fish tank, aquariums and aquatic.Disc Hydroponics Aquarium Fish Tank. Decorative Aerator Bubble Diffuser Release Tool. Oxygen Diffuser Stone Air Pump Accessory. Fresh Tanks Saltwater Tanks Circulation System. Aquarium Bubbler Stone Air Pump Replacement Parts. [Application]: disc great for growth systems, ponds, fish tank, aquariums and aquatic. [Premium Material]: The Air pump stone disc is made of high quality sand material and sintered at a high temperature, which is sturdy, and durable. [Easy to Use]: Soak the stone completely in water for 30 minute before use, and clean it regularly with a brush. [Fine Dense Bubbles]: with a small air outlet can release fine and dense bubbles, a great accessory to properly aerate a home aquarium/medium fish tank. [Size]: Standard ID airline tubing: 0.16inch/ 4mm, suit for most fish tanks.