Air Pumps & Accessories - Underwater Warehouse

Air Diffusers Air Diffusers & Manifolds are a very convenient, and necessary method of distributing air to where it is requir...	Air Manifolds & Valves Air diffusers come in a variety of styles and sizes and have a very long life. Choose the air stone size and quanti...	Airline Tubing This thick-wall, lead-free hose is the toughest on the market! Self weighted for super easy installation. U...
Air Pump Covers Many of the aeration systems are left out in the open. We offer a unique line of products to help you not only pr...	Hakko Air Pumps Hakko Air Pumps are high volume diaphragm pumps designed for a variety of low-pressure applications. Koi pond aer...	Medo Linear Air Pumps Compact, quiet, and functionally vibration free, the highly reliable Linear-Piston Pump will enhance your system's ...
Gast Air Pumps & Kits Since 1921, Gast Manufacturing, Inc. has embraced its position as a leader in the design and manufacture of air-mov...	Gast Blowers The Gast full line of Regenair® Regenerative Blowers for high volume vacuum or compressed air applications offe...	Pondmaster Air Pumps The Pondmaster® AP-Series air pumps have been designed to satisfy the requirements of a multitude of water-rela...
Windmill Aeration Go green! Let Mother Nature do the work for you when it comes to pond aeration. These wind driven aerators replace ...	Outdoor Water Solutions Windmills A backyard version of an Outdoor Water Solutions windmill has been designed and created with the same high standard...	EasyPro Linear Aeration Kits These diaphragm linear aeration kits now include weather proof compressors allowing use outdoors without further pr...
Oase Aqua Air Floating Air Injector

Every living thing needs oxygen ... this of course includes Koi and also the bacteria that we need to provide for proper biological filtration.

Aeration is vital to maintaining a healthy pond or water garden. You can accomplish proper aeration through the use of an aerator, or creating waterfalls and fountains.

Different Types of Air Compressors:

• Linear Compressors - Extremely energy efficient, silent and reliable compressors. Low pressure capability prohibits use in deep applications, but these pumps are great for shallow (less than 6-8') ponds, tanks, aquariums and many other applications.
• Diaphragm Compressor - High pressure, low volume compressors widely used for deep pond aeration and destratification.
• Rotary Vane Compressors - Medium volume, medium pressure compressors ideal for aeration of larger ponds and lakes less than 18' deep.
• Rocking Piston Compressors - Provide slightly higher pressure than rotary vane compressors. Ideal for aeration of ponds/lakes up to 30' deep.
• Piston Compressor - High pressure compressors for aeration, destratification and de-icing of waters up to 75' deep.
• Regenerative Blowers - Super high volume, low pressure blowers for aeration of tank system and shallow ponds.

Air diffusers come in a variety of styles and sizes and have a very long life. Choose the air stone size and quantity which will match the air output of your air pump. Most air stones are rated to deliver or allow a certain amount of air per minute. Usually they are rated in cubic feet of air per minute or CFM. A small air stone may only allow 0.05 cubic feet air per minute. A large size air stone might allow 0.5 CFM. If you use too small an air stone or too few, you will place excess back pressure on the air pump. You can increase the number or size of stones or use a pressure relief valve.
To convert your air pumps rating of Liters per Minute to Cubic Feet per Minute divide LPM by 28.25 to give CFM.

Example: your HAKKO 40L will deliver over 50 LPM at 58 inches water depth. 50 ÷ 28.25 = 1.77 CFM. A 1.5” x 1.5” ceramic air stone will allow 0.25 CFM, you should use at least 7 of this size air stone.

So how much air do you need?

These numbers are intended as a guideline. Your application may vary according to stocking levels. (In general terms, 40lpm per 1000 gallons is a good rule of thumb.)