SpaChoice 2-Pounds 2-Pack Premium Re-Energize Spa Shock, Hot Tub Shock, Made in USA

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. 1. After every use, add 2 ounces of this product per 500 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.