Four air bases with 9 air disc diffusers. Professional aeration systems are designed for easy installation and will help improve water quality, eliminate temperature stratification, and promote a healthy environment for all aquatic life. Maximum Depth is 40' for these kits. We do not leave feedback until it is left for us - please leave positive 5 star feedback and if you are not satisfied for any reason please let us know so we can attempt to correct any problems you may have.The item "NEW Matala Aeration Kit 2+ Acre 400' Tube 4 Diffuser's+Cabinet MEA Lake Pro 4C" is in sale since Wednesday, May 25, 2016. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Ponds & Water Features\Pond & Fountain Fittings & Pump Parts". The seller is "diypondaeration" and is located in McKinney. This item can be shipped to United States.