Airmax PondAir 4 Aeration Kits will increase oxygen for your small pond and keep your fish healthy. Why aeration? Aeration helps increase the amount of dissolved oxygen available for fish in your pond, this is especially important during hot summer nights when plants do not produce enough oxygen. Pond logic will also assist your pond in breaking down excessive organic waste such as fish waste and other detritus materials. The breakdown of excessive organic material will deter plant growth such as algae, deter murky water, and promote overall water clarity/health. Quad-output compressor that uses only 8 watts and a max air flow of 0.31 CFM. 4 rolls of 30 black vinyl airline. 4 round blue air stones. 4 check valves. Aerates up to a 2,000 gallon pond up to 2 feet deep.