Aeration of ponds using air pumps and diffusers in the pond is a great way to ensure good circulation and effective oxygenation of the pond. Proper oxygen levels maintain fish health and reduce the build-up of unwanted nutrients in the pond. Algae and muck can be reduced using aeration systems. The simplest aeration system uses an air pump on shore feeding diffusers at the pond bottom. Different sizes of air pumps and diffuser air stones and discs are available. Aeration is an important factor to achieving success of your pond. Whether oxygen is added through a waterfall, fountain or bubbler system the maintenance of oxygen levels in a pond can be more crucial than filtration because fish will perish faster in water without oxygen than they will in water with high ammonia or nitrite levels due to poor filtration. Proper aeration for your pond ensures neither of these problems ever occur. Success of pond filters is based on adequate oxygen levels in the water so that the aerobic bacteria that require oxygen to complete the nitrogen cycle effectively are in oxygen-rich waters. In some fish ponds, just having a waterfall may not be enough to keep the oxygen saturation at appropriate levels at all times, and in this case a small bottom diffuser system can ensure high quality pond cleansing and fish health.