The following graph shows the values in a busy recreational pool with rapids, wave pool, waterfalls, fountains, etc. with highly fluctuating occupancy. At off-peak times there are only 10 swimmers, at peak times 100. Let’s briefly review how the system automatically adapts to the number of visitors on a Saturday. When more visitors come, the free available chlorine is bound and new chlorine needs to be administered which causes the pH to increase. If in the graph the pH rises, this is because new chlorine is administered because more pollution enters the water via the visitors.
- The system automatically adapts to the additional occupancy.
- The free available chlorine level drops to a maximum of 0.25ppm, remaining safely above the lower limit.
- At the peak moment there is temporarily 0.37ppm, but after 30 minutes this has already dropped back to 0.28ppm.
- The pH does not go above 7.18.