hygger 4-inch Aquarium Air Stone Kit, Fish Tank Bubbler, Compact Stainless Steel Covered Brick-red Air Stone Disc, Produces Micro Bubbles, with 8.2ft standard Size Air Tubing Hose;

This brick red aquarium air stone disc is made of a special nontoxic mineral material, fired at a high temperature of 1300 degrees Celsius.
The air diffuser area is smooth and exquisite, not like other poor quality air stone touch rough.

This kind of air bubble stone has the following features:
- Super sturdy & durable, service life can last up to 2 years.
- Weighs enough to sink in the bottom, no need suction cups.
- Dissolve more oxygen or CO2 to the water.
- Nice high output of amounts of bubbles.
- Quietly produce dense super small bubbles.
- Strong filtration, for fresh and salt water.
- High pressure sealing with a rubber ring.
- Easy to clean with brush.
- Comes with a 8.2 ft air hose.

Want to create beautiful and fairy bubbles wall in your aquarium, please buy 2 or more different size of air stones.

Specification:
Sizes: 4 inch.
Weight: 5.76 oz/163g.
Outlet size: the external diameter of the air outlet is 4mm
Compatible air pump wattage: 4W or larger wattage air pump, choose the pump according to your gallon of tank water.

Use Directions:
1. To achieve better effect, please immerse the air stone in water for an hour before putting it into use.
2.You need to use the air stone with a right wattage of air pump according to the tank size.
3. When you find there is no any bubbles when you put the air stone in a deeper water, pull it up close to the water surface
to check if you need a larger air pump or the stone is defective.
4. Bubbles size is also related to how powerful the air pump is.
5.Cleaning tips: to last the service life, we suggest to clean the disc once a week, or any time when clogged with dirt or producing
bubbles with low quantity. You need to clean algae and other impurities on the disc to prevent holes blocked.

After-sales Warranty:
1. 1 year free warranty (just contact us).
2. Free replacement within 3 months.