Water aeration can be defined as the process of adding a gas such as oxygen to water or the process of removing a gas from raw water. This is often used to oxidize troublesome components in water such as iron for subsequent filtration. Aeration is also used to strip undesirables such as volatile organic carbons and radon gas. Depending how easily the problem gas releases from the water, simply spraying the gasified water into an open tank will adequately de-gasify.