Sweetwater® Micro Bubble Oxygen Diffusers Size:Aluminum base 12" x 2.5" - 0.13 cfm Oilless design ensures your fish

Oilless design ensures your fish are safe

Freeze Control

as one teaspoon treats 100 gallons or more

Will not harm pond biological filtration

Kasco has a tool to help you picture these fountains in your pond

Sweetwater® Micro Bubble Oxygen Diffusers Size:Aluminum base 12" x 2.5" - 0.13 cfm Oilless design ensures your fishThese ultra fine pore diffusers are ideal for pure gas applications (oxygen, carbon dioxide), high density hauling, holding grow out tanks and emergency aeration. Choose from aluminum or nylon 6 glass composite (plastic) base. Optimal running pressure is 20 to 30 psi. Max 50 psi Aluminum models are best for long term, heavy duty use. Plastic models are tested at 20C to ensure performance and integrity. They also give you the convenience of two 1 4"