2 pieces per pack
Replaces many air stones in common box filters and undergravel riser stems
The Power Agitator
Flexible, porous air tubes with large surface area
Provide powerful aeration and water agit...
Durable air stones effectively create water currents and dazzling underwater scenes
Increases surface agitation, oxygenates water
Helps release carbon dioxide build-up
Small sizes fit common box filte...