Regal 30-60330-12 2kg Oxy Clear Shock (Non-Chlorine Shock/Oxidizer) performs effectively as a shock treatment in reducing organic contamination of swimming pool water. Eliminates chlorine smell and reduces skin and eye irritation. This oxidizing and reactivating treatment restores pool water clearness and ensures longer lasting chlorine power. Ideal as initial treatment at the start of the season followed by the use of a sanitizer.