This little air stone is underrated. Adjustable, with replacement parts if ever needed. Super easy to figure out. Tighten the pads for finer bubbles, loosen for larger ones.
If I could give these a 10 star I sure would they works wonders perfect with the sponge filters.
Switched it out from my disintegrating ceramic air stone. Right away I noticed a more consistent bubble and air flow. Also my air pump has been a lot quieter since the switch!
Good product. Have had them running for a while.
Put them in my sponge filters, been running for about two weeks-- so far, so good.
$4.99 Flat Rate