Did you know that the sun hastens the dissipation of chlorine, so the best time to add sanitizer is in the evening. If your sanitizer is added automatically (e.g. in a salt pool) while the pump is on, run it at night if you can, for best efficiency.

Having lots of swimmers at any given time will introduce more pollutants like body oils, perspiration, sun tan lotion, and so on, and you need to compensate by adding more chlorine. Encouraging pool users to shower first has merit, but welcome to the real world!

Heavy rain will usually make the water in your swimming pool lose its clarity (start to turn green, or lose its transparency). Add a shock dose of chlorine (say 3-4 times the daily dose) to get the water back to normal. Check the pH, as the water may need acid. When preparing acid solution, remember: water in the bucket first, acid last.

What level of water is best in a swimming pool? Ensure that the water level is never less than half-way up the skimmer opening. If the level is too low, the pump will begin to suck air, and may burn out.