Pond air pump for Koi and large ponds. Avaliable in three diferent sizes with an output ranging from 60 to 60 liters of air per minute at a low energy consumption. The rugged construction of the air pump ensures that the pump produces little noise and has a long lifespam. In this Koi-flow aeration set 6 air stones are included and a 501m air hose. The airstones allow you to add air in serveal different places in the pond and filter thereby optimising oxygen levels.