Aerated water is important for the health of your lake or pond because aerated water is oxygenated water. Oxygen is required by almost all aquatic organisms to breathe. When oxygen is lacking, anaerobic organisms, those that don’t breathe oxygen, take over. An overgrowth of anaerobic organisms can lead to foul odors, lake or pond acidification, and/or toxic byproducts. These poor conditions lead to the loss of macroinvertebrates, loss of fish, increase in mosquitoes, and organic sediment accumulation. Oxygenation is key to the health of aquatic ecosystems.