PQ Block-Out protects chlorine from ultra violet light.
996g/Kg (99.6%) Cyanuric Acid
Allows chlorine to work more effectively.
Reduces chlorine demand.
The level of stabiliser (cyanuric acid) should be tested every 6-8 weeks depending on rainfall.
Mix in a bucket of water first and then broadcast over the entire swimming pool.
200g per 10,000 litres will raise the cyanurate level by approximately 20ppm.
Cyanuric acid may take up to 24-36 hours to dissolve completely.
Dosage rates indicated are a guide only. Please refer to the label on the bottle for further instructions.
We recommend that you obtain advice from our Pool Professional before adding any treatment to your pool or spa.