How to build an Air Lift Pump

An air lift pump is relatively easy to build and an inexpensive option for a low budget system. There are so many uses for this versatile device that the only limit is your ingenuity and imagination. The concept is simple and commonly used in aquarium under gravel filtration systems. The rising air bubbles will push liquid upward between the bubbles. The air lift is great for hydroponics because not only does it supply oxygen, it also provides nutrient circulation. The main drawback of this type of system is noise.