Smooth, Fine Bubbles for Happier Fish
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A simple way to boost oxygen in your tank or hydroponic setup.
This round air stone creates soft, tiny bubbles that help your water stay fresh and full of oxygen. It’s great for aquariums, ponds, and hydroponic systems, and it keeps your fish and plants feeling their best. Just connect it to an air pump and enjoy steadier water movement and better breathing for your underwater friends.
A small tool that makes a big difference.
✔ Helps raise oxygen levels fast
✔ Works in tanks, ponds, and hydroponics
✔ Made with durable sintered mineral media
✔ Gives long-lasting fine bubble output
✔ Easy to connect to standard air pumps
Available in 5cm, 7.5cm, and 10cm sizes. For best performance, rinse before first use and check your air pump tubing fit regularly.
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.
What does this air stone do?
It releases fine bubbles that help increase oxygen levels and improve water movement in your aquarium or hydroponic tank.
Is it safe for all fish?
Yes, gentle bubbles make it safe for most freshwater and pond fish.
How do I install it?
Simply attach it to airline tubing and connect it to your air pump, then place it in your tank.
Fine bubbles help your fish breathe comfortably and stay active.
Extra oxygen supports cleaner, fresher water in aquariums and hydroponic systems.
Keeps your tank from feeling stagnant and helps circulation.
Made from sintered mineral media for long-term use.
Great for small fish tanks, ponds, and plant-growing systems.
Designed for stronger bubbles and longer life.
| Features | MK Aquarium | Knock-Offs |
|---|---|---|
| Fine bubble output | ||
| Durable mineral media | ||
| Consistent oxygen flow | ||
| Works in tanks and hydroponics | ||
| Multiple size options | ||
| Easy air pump connection | ||
| Steady water movement | ||
| Long-term performance | ||
| Smooth round shape | ||
| Reliable bubble control |
Yes, it works well in both indoor tanks and outdoor pond setups.
Smaller tanks do well with the 5cm, while larger tanks or ponds benefit from the 7.5cm or 10cm sizes.
Any standard aquarium air pump should work as long as it matches the size of your tank.
With normal use, the sintered mineral media provides long-lasting performance.
It fits most standard aquarium airline tubing used for air pumps.
The air stone itself is quiet, and overall noise depends on your air pump.
A quick rinse now and then helps keep the bubbles flowing well.
Yes, it helps keep plant roots oxygenated for healthier growth.
No, both black and white options perform the same.
