PINVNBY Aquarium Air Stone Diffuser, 4.2-Inch 4-Pack with Suction Cups

PINVNBY 4.2-inch air stone discs are made to add oxygen and water circulation in aquariums and other aquatic systems; this set contains four discs.

• Carborundum material and 300–500-micron bubbles — creates a stream of small bubbles for water oxygenation.
• Three suction cups — help hold an air stone in position and reduce friction abrasion.
• 12 L/min jetting volume — provides the model’s stated airflow output.
• Suitable for a 40-inch fish tank — gives aquarium owners a size reference for choosing the diffuser.
• Recommended air pump power: 4–8 W; maximum pressure: 0.012 MPa — helps match the stone to an air pump.

Use these round diffusers when you want to add bubbles and oxygenation to a freshwater or saltwater aquarium, fish tank, pond, hydroponic system, or aquaponic setup. In a display aquarium, the bubbles also add a visible decorative element. The set is intended for water systems that use an air pump, with the stated pump range and tank size helping you assess whether the model suits your setup.

What can I use the PINVNBY air stone discs for?

They are designed to add airflow and circulation to water in aquariums, ponds, hydroponics, and aquaponics. In fish tanks, the bubbles help oxygenate the water for aquatic life; in a display aquarium, they create a bubbling visual effect. The same disc format can therefore serve a functional role in a water system or a decorative role in an aquarium.

• For freshwater and saltwater tanks
• For pond, hydroponic, and aquaponic systems
• For decorative bubble displays in aquariums

What size tank and air pump suit model ASD108?

Model ASD108 is suitable for a 40-inch fish tank and has a recommended air pump power of 4–8 W. Its 4.2-inch (10.7 cm) disc size gives you a physical measurement to compare with the available placement area in your tank or system. The model’s maximum pressure is 0.012 MPa, so use the stated pump range and pressure as practical matching details when planning your setup.

• Disc diameter: 4.2 inches (10.7 cm)
• Recommended pump power: 4–8 W
• Maximum pressure: 0.012 MPa

How does the diffuser stay in place?

The included suction cups hold the air stone in position and help prevent friction abrasion. This is useful when positioning the diffuser within a tank or system, where movement against a surface could otherwise wear the stone. The product is made from carborundum and produces small bubbles measuring 300–500 microns.

• Three suction cups are included
• Round disc design
• Creates 300–500-micron bubbles

PINVNBY’s four-disc set suits aquarium keepers and growers using hydroponic or aquaponic water systems who want to add oxygenation, circulation, or visible bubbles. It is sized for a 40-inch fish tank and intended to operate with an air pump in the recommended power range.

Read our guide: Signs of illness in aquarium fish, and how to quarantine new arrivals