Reasons Aeration in your pond is necessary

Aeration infuses oxygen into the pond. Adding pond water aeration is beneficial for your fish who need oxygen to survive. It also improves the overall health of your pond’s ecosystem.

  • Aeration reduces pond sludge. Through time nutrients accumulate at the bottom of your pond and become muck. It is this sludge at the bottom of your pond that can give ponds a bad smell. Aeration increases the dissolved oxygen and circulates water. This pond water aeration encourages the colonization of beneficial aerobic bacteria that consume the nutrients to reduce existing sludge build-up. It also prevents sludge from accumulating in the future. If you do not have sufficient oxygen in your pond you will not have beneficial bacteria in your pond. Beneficial bacteria produce harmless gas when breaking down the sludge and other matter at the bottom of your pond. You will have anaerobic bacteria which produce carbon dioxide and hydrogen sulfide when they break down all of the sludge at the bottom of your pond. This is what causes the nasty smell. Clearly when you have plenty of aeration you will have aerobic bacteria which are beneficial to your pond
  • Aeration improves water clarity. When nutrients accumulate at the bottom of your pond and result in sludge they also cause your pond to become cloudy. By reducing the nutrients with aeration and therefore sludge you will improve water clarity.
  • Aeration will reduce the quantity of algae and weeds. There will be less nutrients in your pond because you have increased circulation. You will also have increased oxygen and therefore there are less nutrients to feed algae and weed growth.
  • Aeration boosts dissolved oxygen levels. Fish and bacteria in your pond need oxygen. Aeration encourages contact between the water and the environment, which will increase the dissolved oxygen level in your pond.
  • Aeration prevents large temperature and oxygen level differences in your pond.  A thermocline (sometimes metalimnion in lakes) is a thin but distinct layer in a large body of fluid (e.g. water, such as an ocean or lake, or air, such as an atmosphere) in which temperature changes more rapidly with depth than it does in the layers above or below. In your pond this means that the bottom of your pond is colder than the top and so the bottom of your pond has less oxygen than the surface. In a well aerated pond the water movement means that the cooler less aerated water will be forced to the surface to warm up and gain more oxygen and the warmer oxygen rich water will go to the bottom of the pond. This means that the temperature and oxygen levels are more consistent at all levels in your pond.
  • Aeration prevents your pond freezing over. If your pond freezes over the gases produced when bacteria breakdown organic matter at the bottom of your pond can not escape. This will therefore mean the oxygen levels in your pond will deplete and can result in fish suffocating. If you aerate your pond you can keep a hole in the ice which lets the unwanted gases escape and allows oxygen into the water.