4 Pack-Southern Hydroponics 3” (75mm) Round Air Stones for Aquariums to provide Increased O2 Levels has 3/16” port for air hose.

Southern Hydroponics Air Bubble Stone for Hydroponics, pond, aquarium, fish tank, etc. SH-03. Ideal for shrimp and smaller aquatic life.

Adds oxygen to your Aquarium, pond, hydroponic system, and Aquaculture. Creates bubbles to increase dissolved O2 levels for for aquatic life for respiration.

Condition is New. Shipped with USPS Ground Advantage.