Best Performing Non-Chlorine Shock
Also called chlorine free shock, OXY shock, safety shock and oxidizing shock, a non-chlorine shock treatment has Potassium Monopersulfate (MPS) as its active ingredient. Like chlorine, Potassium Monopersulfate is a powerful oxidizing agent that destroys organic contamination and breaks down odorous and irritating chloramines that have build up in the water. But unlike chlorine, it is not a sanitizer and should only be used in pools, spas and hot tubs that have an existing sanitization system, be it chlorine, bromine or ozone based. You will notice a range of Chlorine free pool shock products on the market advertised as blended oxidizer, clarifyer/flocculants. While these may offer good performance, always check for the percentage levels of MPS when comparing different product options.
If you are in the market for non-chlorine shock then consider these two options below. Both are best-sellers offering a highly effective shock treatment:
Some of the advantages of non-chlorine shock are listed below:
- Pool downtime is minimized. The best non chlorine pool shock products are quick dissolving, work rapidly and do not need to dissipate. With most products, swimmers can re-enter the pool after only a few minutes have past. This may vary depending on the product used so always follow the specific product instructions.
- The risk of byproducts forming such as calcium or cyanuric acid is reduced.
- Non chlorine shock is safe for use as a spa shock as will not damage delicate spa surfaces. It is also safe as a vinyl pool shock as the product is non bleaching.
- Less affected by heat and sunlight than chlorine products.
- The dosage calculation is simpler than with chlorine shock. If non-chlorine shock is used in excess it will convert ordinary salts present in the pool into free chlorine.
- Many of the best products on the market (including the two posted above) are pH buffered so won’t cause pH fluctuations in your pool or spa.
On the downside, non chlorine shock is generally more expensive than chlorine based shock treatments. In addition as it is not a sanitizer, some pool experts recommend using chlorine based products for pool start ups, and after fresh water spa fills to ensure that enough residual chlorine is available in the water.