Recommendations

1. Do not allow free chlorine levels to exceed a maximum of 3 ppm, bromine levels a maximum of 4 ppm for long periods. Peak chlorine levels of 5 -10 ppm are required for superchlorination, but should be allowed return to the 2 -3 ppm range by natural dissipation. If bleaching of the blue liner colour is occurring, it is a direct indication that the chlorine levels have been too high.
   
   
2. Routinely stabilize outdoor and indoor chlorinated swimming pools with cyanuric acid stabilizer and maintain a minimum level of 50 ppm. It is recommended that levels be checked every 3 or 4 weeks.
   
   
3. Maintain pH levels in the 7.2 - 7.8 range.
   
   
4. Test result accuracy can be adversely affected by poor quality test kits and reagents. Keep reagents current by replacing them every 6 months and use a professional quality test kit recommended by your pool dealer.
   
   
5. Use non-chlorine shock to reduce organic contaminants, rather than high levels of chlorine or bromine during the pool season, as well as preparing the pool for winter.
   
   
6. Use flocculants and a filtration system in proper operational condition to remove undissolved particulate matter instead of high levels of chlorine/bromine oxidizer, to attain sparkling clear pool water.
   
   
7. It is important to maintain thorough circulation of the pool water in order to prevent settling and concentration build-up of chemicals on the pool bottom. Even liquid chlorine can settle to the bottom if sufficient inter-mixing is not achieved.
   
   
8. Frequent reports have been received concerning wrinkle development on walls of pools employing automatic pool covers. The phenomenon is most likely a result of chlorine concentration build up due to the air tight nature of the cover design and/or temperature differentials between water side and ground side of liner causing accumulation of moisture from condensation that forms ripples.

Note: Vinyl Spa Liners

The material formulations for vinyl spa and pool liners are very similar; therefore, the above information relating to the sanitizer induced water absorption that results in wrinkling is also valid and applicable to spa liners, keeping in mind some differences in chemical treatment practices.