Spa Choice Re-Energize is an oxidizing spa shock. Re-Energize oxidizes organic contaminants such as ammonia, perspiration, and suntan lotion. Re-Energize also removes chloramines and bromamines which cause "chlorine odor" and enhance the sanitizing effectiveness of chlorine and bromine by reducing the formation of new chloramines and bromamines. Re-Energize also increases the clarity of spa water and reduces eye burn. This product is a powerful oxygen-based oxidizer. When used regularly, it will eliminate organic contaminants and keep spa water crystal clear. This product will not raise chlorine levels or produce combined chlorine or chloramines which can cause chlorine odor and eye irritation. DIRECTIONS FOR USE: 1. After every use, add 2 ounces of this product per 300 gallons of water. 2. Run the pump for at least 30 minutes. 3. Turn the jets on and off once or twice after adding this product to improve the treatment.