One of the most critical aspects in the design of an effective aeration system is choosing the proper size blower. A blower that is too large will most likely overheat from constant back-pressure, and will have a short life. And a blower that is too small will not deliver enough air to the system.

The basic rule of thumb to follow when choosing a blower is that it should deliver a constant airflow of .4 SCFM per foot of aeration tubing. This holds true regardless of the length of tubing used. However, in order to deliver the required .4 SCFM, higher horsepower ratings will be needed as both the footage of tubing and the water depth increase. Since each manufacturer of blowers has different specifications for their units, it is recommended that you refer to the flow and head loss charts that relate to unit you choose.

For larger aquaculture aeration systems, it is important that you use a “clean” air blower, such as a regenerative blower or a positive displacement blower. Never use an air compressor or any other type of unit that may emit oil or other residue into the system. This will not only cause water pollution, but will lessen the efficiency of the tubing, as well.

In addition, flow valves should be used to balance the airflow to each segment of the system, and blowers should always have a clean air filter in place during operation. Proper maintenance and care of the blower will help to extend the life of the entire aeration system and, in turn, will help to maintain higher production levels.

The type of aeration tubing used in an aquaculture system is another important factor in providing proper aeration levels. When compared to other products and other methods of aeration, Colorite AeroTube™ aeration tubing is truly superior. Here are some key comparative points:

• Mechanical aerators provide from 1.7 to 3.0 pounds of oxygen per horsepower used, where Colorite AeroTube™ aeration tubing yields from 4 to 8 pounds of oxygen per horsepower used in fresh water, depending on the SCFM per foot. In salt water, AeroTube™ supplies up to 15 pounds of oxygen per horsepower, making it the ideal choice for shrimp and salt water fish aquaculture.

• Colorite AeroTube™ aeration tubing does not break like air stones, is much easier to clean, lasts much longer, and costs approximately 1/8 as much.

• When cleaning is required, Colorite AeroTube™ can be simply washed off with plain water and a gloved hand. No acids or other caustic cleansers are needed. What’s more, AeroTube™ is highly durable and practically indestructible.

Colorite AeroTube™ aeration tubing also offers these distinct advantages:

• Cuts energy costs by up to 75%
• Maintains higher dissolved oxygen (DO) levels
• Allows for higher stocking densities
• Allows for higher quantities of food per feeding
• Allows for more frequent feedings
• Helps to promote faster fish growth
• Low start up cost
• Low replacement cost