Pawfly Aquarium Air Stone 4 Inch Bread, Fish Tank Air Stone Oxygen Diffuser For Air Pump Fish Tank Bucket Pond And Dwc Reservoir, 2 Pack

An airstone, whose purpose is to gradually diffuse air into the tank and provide oxygen for fish to breathe, is a necessity to have around your aquarium if you are a lover of aquatic animals.
It’s also a must have for Hydroponic and Circulation system. Pawfly air stones are made of high quality non-toxic mineral material.
With high temperature sintering, stones are sturdy and durable, have high dissolved oxygen rate and create even and tiny bubbles rather than a limited number of large ones.

Features
4 Inch for large tank
Lots of small bubbles
Sink to the bottom
Require air pump > 4W
Included 2 PCS Air stone