Hydrogen Peroxide
During extreme heat or when over population of your tank or live well occurs, add 1 ounce of 3% Hydrogen Peroxide per 3 gallons of water (i.e. a 15 gallon tank requires 5 ounces of solution). This additive is effective due to H2O2 molecular compound that makes up Hydrogen Peroxide.
When mixed with water (H2O), the H2O2 compound breaks down to into water (H2O) and oxygen (O) molecules. This higher concentration of oxygen is ideal for keeping fish alive in extreme heat and over populated tanks.