Pawfly5 Pack Aquarium Air Stone Cylinders Compatible Mini White Bubbler Replacement for Specific Classic Tube Flow Halo and Life Fish Tanks Bubble Diffuser for Nano Air Pumps

Have now been using the first air stone for around two weeks. Works fine however I think they are a little noisy compared with the Bi-Orb originals. Maybe it's because the bubbles are a bit larger. Don't know if that will affect the function of the filter - only time will tell. The extra noise may be an issue if the tank is situated in a bedroom.

Easy to fit effective in use thanks

I got these as Biorb were out of stock but they are useless very low flow definitely something is different about these

Cheap