These are the best air stones out there. They are weighted so they naturally sink. They can be taken apart so that if they were to ever clog, they can be cleaned or replace the disks outright.  They also work great inside sponge filters. Really they are the best air stone money can buy. Instead of replacing a cheap ceramic air stone every 4-6 months as they get worse and worse for bubbles, install one of these once and nearly never worry about it again. Tighten or loosen the disks to change how big the bubbles are.

Never Clog Air Stone

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These are the best air stones out there. They are weighted so they naturally sink. They can be taken apart so that if they were to ever clog, they can be cleaned or replace the disks outright.  They also work great inside sponge filters. Really they are the best air stone money can buy. Instead of replacing a cheap ceramic air stone every 4-6 months as they get worse and worse for bubbles, install one of these once and nearly never worry about it again. Tighten or loosen the disks to change how big the bubbles are.

Customer Reviews

Based on 156 reviews
97%
(151)
3%
(4)
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M
M.M.(.
Consistent Quality

I've purchase close to a dozen of these airstones from Aquarium Co-op - pretty much one per each sponge filter I've purchased. The oldest ones have been running for 6+ months, and haven't needed any maintenance in that time.

A
A.H.
Fits inside the sponge filters

These airstones I ordered fit perfectly inside the aquarium co-op sponge filters!

A
A.M.
Best airstone! Best price!

Truthful to its name never clogs! I've just bought some more for my hospital tanks and for my new fry project!