Smooth, Steady Bubbles for Happy Fish
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A simple way to boost oxygen and keep your tank fresh.
The Round Air Stone adds gentle bubbles that help your aquarium or hydroponic system breathe. It supports better water flow and steady oxygen levels, which makes life easier for your fish, plants, and you. Just connect it to standard tubing and enjoy smooth, even bubbles that keep your water moving and your tank lively.
Easy to use, reliable, and ready for daily tank life.
✔ Boosts oxygen in aquariums and hydroponics
✔ Helps support healthy fish and stable water
✔ Connects to standard 4 mm or 8 mm tubing
Soak the air stone before the first use to help it release bubbles smoothly. Rinse it when needed to keep it clean and working well.
We are proud to offer duty-free, reliable, tracked shipping— delivered to your door in over 200 countries worldwide!
Below you can check our average shipping times:
Domestic USA Shipping: 2-9 business days
US & Canada: 7-18 days
Europe: 7-18 days
Europe Plus*: 8-30 days
Australia, New Zealand: 7-18 days
Hong Kong, Singapore: 7-18 days
Rest of the world: 8-30 days
*does not include processing times up to 2 business days or longer in peak periods
Primarily we ship out from fulfillment centers in the United States, Eastern Asia and Western Europe. If the item you've purchased is out of inventory in your nearest location, we'll send it directly from our production lines at the same delivery times as stated in our shipping section.
Does this fit my air pump?
Yes. It connects to standard 4 mm or 8 mm tubing, which works with most common aquarium air pumps.
Is it safe for all fish?
Yes. The gentle bubble release is safe for most freshwater and planted tanks.
How do I get the best bubble flow?
Soak the air stone before your first use, then place it where you want smooth circulation.
Gentle bubbles help keep water moving so your tank stays fresh.
Improved oxygen levels make breathing easier for your fish.
Helps your aquarium or hydroponic system stay balanced.
Sintered design holds up well in everyday tank use.
Connects quickly to standard tubing and common air pumps.
Simple, steady, and built for reliable bubbles.
| Features | MK Aquarium | Knock-Offs |
|---|---|---|
| Fits standard aquarium tubing | ||
| Durable sintered material | ||
| Smooth bubble release | ||
| Works with most air pumps | ||
| Supports stable oxygen levels | ||
| Helps improve water flow | ||
| Easy to clean and maintain | ||
| Reliable for hydroponics | ||
| Good for daily tank use |
Connect it to standard 4 mm or 8 mm tubing and attach it to your air pump. Place it anywhere you want better bubbles or circulation.
Yes. The air stone works well for boosting oxygen in hydroponic water beds.
Rinse it when you notice weaker bubbles. A quick clean keeps it flowing well.
Yes. The steady bubbles help improve overall water circulation.
The air stone itself is quiet. Any sound usually comes from the air pump you use.
Yes. It’s built to handle steady, daily use with most common air pumps.
Soaking helps the stone release bubbles evenly, so it’s worth the quick step.
Yes. The gentle bubble flow is suitable for both small and larger aquariums.
Use either 4 mm or 8 mm standard aquarium tubing, depending on your setup.
