To reduce sanitizer level before using your pool:
1. Test the sanitizer level. If readings are higher than 3 ppm, add KNOCK OUT in small quantities (50 mL per 10,000 L of pool water) to reduce high sanitizer level back to acceptable levels 1-3 ppm.
2. Wait for 1 hour.
3. After adding KNOCK OUT, check water’s pH and adjust to 7.2-7.8 if necessary.
Do not exceed dosage. Use in small increments and test water between additions of this product.