Mudder Aquarium Air Stone Diffuser Discs, 4.1-Inch 4-Pack with Suction Cups

Mudder air stone discs diffuse pump-fed air into aquariums, ponds and hydroponic systems, with four 4.1-inch (10.5 cm) discs and 12 suction cups for aeration and water movement.

• Four sintered mineral air stone discs — add multiple diffuser points across a suitable water system.
• 12 L/min bubble output — supports aeration and water movement.
• 12 suction cups included — help hold discs in position and reduce friction abrasion.
• Fits 3/16-inch and 3/8-inch inner-diameter tubing — accommodates either listed tube size.
• Recommended for 4W–8W air pumps, with best performance at 8W — helps match the diffuser to a pump.

These round diffusers are made for systems where adding bubbles and moving water is part of routine aquarium, pond or hydroponic care. They can be used in freshwater and saltwater aquariums, fish tanks, ponds, hydroponic systems and aquaponic setups. Fine bubbles support oxygen exchange and water movement; in hydroponics, aeration can help maintain nutrient solution and support roots and plant growth.

What does the Mudder air stone disc kit do?

The discs diffuse air from a connected pump into fine bubbles, helping increase water aeration and movement. Their mineral material is sintered at 1500°C, and the stated standard pressure is 0.01 MPa, with a maximum pressure of 0.012 MPa. The bubble output is 12 L/min. The diffuser is made from non-toxic mineral material and is designed for use with fish, including in freshwater and saltwater aquariums.

• Round disc format for functional or decorative bubbles.
• Fine bubbles support oxygen replacement and lower CO2 levels.
• Suitable for aquariums, ponds, hydroponics and aquaponics.

Which pump, tubing and tank size fit these discs?

Use an air pump in the recommended 4W–8W range; the discs work best with an 8W pump. They fit tubing with a 3/16-inch or 3/8-inch inner diameter and are recommended for fish tanks 24–59 inches (60–150 cm) in size. When water depth is greater than 1.3 feet (40 cm), a higher-wattage pump may be needed.

Each disc measures 4.1 inches (10.5 cm) in diameter and 0.75 inch (1.9 cm) high. Compare those dimensions and your tubing’s inner diameter with your setup before placing the diffuser. The disc has an ABS shell and a sintered mineral diffuser.

• Recommended aquarium range: 24–59 inches (60–150 cm).
• Suitable tube inner diameters: 3/16 inch and 3/8 inch.
• Deeper water may call for a more powerful pump.

What comes in the Mudder air stone kit, and how do you set it up?

The kit contains four air stone discs and 12 suction cups. Before first use, soak a disc in water for two hours. Connect an airline hose to the disc and an air pump, position the disc horizontally underwater, and use the suction cups to hold it in place before switching on the pump.

Before use, repeatedly plug and unplug the hose connection more than four times to help make the bubbles more uniform. The suction cups also help keep the disc in place and reduce friction abrasion during use.

• Four air stone discs.
• 12 suction cups for positioning.
• Initial two-hour soak before use.

How should the air stone discs be cleaned?

Clean the discs about once a month, or more often as needed, to remove algae and other impurities that can block the holes. A brush can be used for cleaning as buildup develops after weeks or months of use. When the discs are out of use, clean them and store them in a dry, shaded area.

• Regular cleaning helps prevent blocked diffuser holes.
• Clean and dry-store between periods of use.

This kit suits aquarium and pond keepers, as well as hydroponic and aquaponic growers, who want pump-powered bubble diffusion with several discs and mounting cups. It is sized for the stated tubing and tank range, and deeper water may require a higher-wattage pump.