Pond Force Aeration Kit w/ 60L Hakko Air Pump Kit comes with the Hakko 60L Air Pump, one of the leading air pumps for it's size! Includes 30' of 3/8" ID weighted airline as well as 2 x 12" alumina airstones and an economy rock cover By simply adding aeration to your pond you can drastically improve the quality of your water! Aeration also promotes fish and plant health! Aerators can be run year round, acting as a deicer during the winter!