Fish and pond life require oxygen rich water to remain healthy. Beneficial bacteria in the pond and filtration systems are essential to the break down of highly toxic ammonia and nitrates, they also require oxygen to flourish and keep the pond free from the build-up of toxic waste. Using a Blagdon oxygenator in your pond will dramatically increase the level of oxygen and reduce carbon dioxide levels. Circulation and aeration prevents stagnation of the water.Aeration is especially important during warm weather when water holds less oxygen. Oxygenating plants produce oxygen during the day but start to use oxygen at night, depleting the pond of oxygen. An oxygenator will provide a complete solution for healthy, oxygen rich pond throughout the day. Aeration by air stone help keep an area ice free in the winder, preventing the build up of toxic gases which can be fatal to the fish and wildlife.Using treatment and medications in your pond often reduce oxygen levels; adding aeration will benefit the fish and wildlife when they are at their most vulnerable. Outdoor Weatherproof water garden air pump Complete kit Increases oxygen in warm weather Helps prevent freezing during the winter, reducing the potential build up of toxic gas Treatments and medications can reduce oxygen levels in your pond. Support your fish with additional aeration and circulation when they need it most