Updated: 26 Feb 2025

40mm air bubble stones

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Updated: 26 Feb 2025

#1

Best Choice
COOMATEC 6-Pack Large Air Stones, Humongous 4 x 2 Inch Round Air for Aquarium, Hydroponics, Fish Tank, Koi Pond, Cylinder Bubble Diffuser for Pump, Growing System

9.8

COOMATEC

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Main highlights

-Stable in Water: Each cylinder measures 2" D x 4" H and weighs 0.66 lbs. It can easily sink to the bottom and stand stably in your tank for steady bubbles.

-Recommended a high-output air pump at least 10W or a commercial air pump.If you feel that there are fewer bubbles, you can try using a high-power air pump, which will have a good effect

-Fits for 3/ 16 inch standard airline tubing.
#2

Value for Money
kathson Mineral Air Stone Bubble 4 Inch Ball Shape Diffuser Airstones for Aquarium, Fish Tank, Pump and Hydroponics(2 Pack)

9.7

kathson

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Main highlights

MULTIFUNCTION: great way to properly aerate a home aquarium. It creates lot of tiny oxygen bubbles that bring vitality fish and hydroponic plants, enhance vital system aeration & water movement, versatile air stone for decorative functional

HIGH QUALITY MATERIAL: This air stones made of high quality non-toxic mineral material, which has no effect on the growth fish and hydroponics, but also promotes it. Round surface flat bottom make stone place steady. Low oxygen consumption & fusion rate.

ADVANTAGE: An ideal way to add oxygen and lower CO₂ levels to your hydroponic, circulation system, fish tank and aquarium，efficient and stable work
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#3
uxcell Aquarium Fish Tank Ponds Ceramic Air Stone Diffusers 40mm x 15mm

9.6

uxcell

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Main highlights

Total Size: 40mm x 15mm; Material: Mineral

Net Weight: 31g

Color: Gray; Package Content: 1 x Aquarium Air Stone
#4
Carefree Fish 1.4/2/4Inch Aquarium Nano Air Stone Disc with 3ft Tube Fish Tank Oxygen Stone Disk Bubble Diffuser Fish Bowl Aerator Stone（Air Pumps Not Included

9.4

Carefree Fish

-30%

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Main highlights

Quality Nanomaterials:Our disc is made of nanoscale material.Bubbles are more subtle and more stable.ABS+ceramic material, resistant to acid and alkali, the surface of the disc is smooth and delicate, is gentle with fish, a faithful companion who cannot harm the fish

Buy one and get seven(six wall control accessories):1*1.4 inch air stone+1*check valve+3ft tube+1*Y-connector+1*8 to 4 reducer+2*suction cups(Does not include air pump)

An 2W air pump is required:If the outgassing of nano air stone is weak, please use a higher-power air pump.

-30%
#5
JZMYXA Air Stones Bubble Stones Fit for Aquarium Fish Tank, 0.98 inch, 10 Pieces

9.3

JZMYXA

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Main highlights

Size: Approx. 0.39*0.98 inch (D*H). The stone need soaking in the water more then 1 hour when useing.

Fit for aquarium, fish tank and hydroponics.

10 pieces. Material: mineral, plastic; Color : white. You need an air pump more than 2.5W to run the stone.
#6
COOMATEC 50 Pack 1 Inch Aquarium Air Stone, Cylinder Bubble Diffuser Airstone Fish Tank Bubbler Pump Accessories for Hydroponics Grey (50 Pack)

9.1

COOMATEC

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Main highlights

--Tiny but Enduring: There are 50 Air Stones in the package, Each air stone for aquariums measures 0.6" D x 1" H and weighs 0.3 oz. Tiny but well-constructed for continual bubbling. Washable and reusable. Ideal for small fish tanks or aquariums.

--Reliable Material: Made of mineral material and sintered at a high temperature, it causes no effect to the health of your aquatics. And not much noise. Help keep your fish growing healthily.

--Dense Bubbles: The air stone cylinders produce a good amount of fine and uniform bubbles. A great way to increase oxygen solubility in your aquarium and enliven the aquatic lives.
#7
Pawfly Aquarium 4 Inch Air Stone, Fish Tank Airstone Bubble Diffuser for Air Pumps Buckets Fish Tanks Ponds DWC Reservoirs and Circulation

9.0

Pawfly

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Main highlights

Reliable Material: Made of mineral material and sintered at a high temperature, it causes no effect to the health of your aquatics. Keep fish or roots growing healthily.

Model: ASD100; Jetting volume: 12 L/min; Recommended air pump power: > 4 W; Inner diameter of tubing: 3/16" or 3/8". Great for aquariums, DWC systems or ponds. (Fit Tanks of 10-60 Gal)

Medium Bubbles: The air stone can produces abundant dense bubbles to aerate your water reservoirs. A great way to increase oxygen solubility in your aquarium and enliven the aquatic lives.
#8
XpertMatic Aquarium Air Stone, 2 Inch Fish Tank Air Stone Disc, Nano Aquarium Bubble Stone, Ultra-High Dissolved Bubbler Airstone for Aquarium Fish Tank, and Hydroponic, SainSmart Air Pump Accessories

8.9

SainSmart

-18%

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Main highlights

Nano Pores: Engineered with ultra-fine nanopores to produce a low-pressure, gentle air output that efficiently oxygenates your tank without disturbing fish.

High Dissolved Oxygen: Generates stable, fine bubbles that dissolve efficiently, enhancing oxygen levels and water quality for a healthier aquatic environment.

Built to Last: Constructed through high-temperature firing, the air disk is perfect permeability, corrosion-resistant, anti-blocking, and durable.

-18%
#9
Air Stone Cylinder Bubble Diffuser Airstones for Aquarium 0.9inch Diffuser Release Tool for Nano Air Pumps Small Buckets and Fish Tanks 5 Pcs (5P)

8.8

Brosay

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Main highlights

Size→Air stones aquariums 2.5cm/0.98inches, universal internal 4mm air pipe.

Material→High-temperature sintered bubble stone made of high-temperature sintering, different from the general market bubble stone. Material is strong and durable, can be repeatedly cleaned, long-term use.

Easy to hide design→Small size, easy to hide in aquarium. It can also create misting effect to beautify your aquarium or fish tank.
#10
Pawfly Aquarium Air Stone Disc, 0.9 Inch Tiny Fish Tank Air Stone Kit Ultra-High Dissolved Bubbler Airstone with Accessories for Aquarium Fish Tank and Small Bucket(Pump and Tubing Not Included)

8.6

Pawfly

-11%

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Main highlights

Model: Y23; jetting volume: 1.5 L/min; recommended air pump power: > 1.5 W; standard ID airline tubing: 3/16 inch. Perfect for nano fish tanks, aquariums or glass buckets.

Free Adjustment: Come with a two-way control valve to manually control the air flow. Simply twist its knob to freely regulate the bubble strength for your multiple needs.

Fine Bubbles: This air stone can produce an abundant cascade of tiny bubbles bursting constantly. Greatly boost the oxygen permeation into the water and bring enchanting landscape.

-11%

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40mm air bubble stones

COOMATEC 6-Pack Large Air Stones, Humongous 4 x 2 Inch Round Air for Aquarium, Hydroponics, Fish Tank, Koi Pond, Cylinder Bubble Diffuser for Pump, Growing System

9.8

Main highlights

kathson Mineral Air Stone Bubble 4 Inch Ball Shape Diffuser Airstones for Aquarium, Fish Tank, Pump and Hydroponics(2 Pack)

9.7

Main highlights

uxcell Aquarium Fish Tank Ponds Ceramic Air Stone Diffusers 40mm x 15mm

9.6

Main highlights

Carefree Fish 1.4/2/4Inch Aquarium Nano Air Stone Disc with 3ft Tube Fish Tank Oxygen Stone Disk Bubble Diffuser Fish Bowl Aerator Stone（Air Pumps Not Included

9.4

Main highlights

JZMYXA Air Stones Bubble Stones Fit for Aquarium Fish Tank, 0.98 inch, 10 Pieces

9.3

Main highlights

COOMATEC 50 Pack 1 Inch Aquarium Air Stone, Cylinder Bubble Diffuser Airstone Fish Tank Bubbler Pump Accessories for Hydroponics Grey (50 Pack)

9.1

Main highlights

Pawfly Aquarium 4 Inch Air Stone, Fish Tank Airstone Bubble Diffuser for Air Pumps Buckets Fish Tanks Ponds DWC Reservoirs and Circulation

9.0

Main highlights

XpertMatic Aquarium Air Stone, 2 Inch Fish Tank Air Stone Disc, Nano Aquarium Bubble Stone, Ultra-High Dissolved Bubbler Airstone for Aquarium Fish Tank, and Hydroponic, SainSmart Air Pump Accessories

8.9

Main highlights

Air Stone Cylinder Bubble Diffuser Airstones for Aquarium 0.9inch Diffuser Release Tool for Nano Air Pumps Small Buckets and Fish Tanks 5 Pcs (5P)

8.8

Main highlights

Pawfly Aquarium Air Stone Disc, 0.9 Inch Tiny Fish Tank Air Stone Kit Ultra-High Dissolved Bubbler Airstone with Accessories for Aquarium Fish Tank and Small Bucket(Pump and Tubing Not Included)

8.6

Main highlights

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