Resin. Resin pools are one of the most popular options because they really are the toughest, longest-lasting above ground pools you can find.

Generally, pool water needs to be replaced once every five to seven years. This should be done during mild weather so that your pool surface is not at risk from strong sunlight and heat. Your pool maintenance company can recommend when it is time to drain your pool.

Fecal incidents, fatal or nonfatal drowning incidents, vomitus, and dead animals can contaminate a pool. Contamination can be from bacteria, viruses, or chlorine hardy microbes like Cryptosporidium (“Crypto”).

You use a test kit, which has either test strips, or a little white pill that you drop into a graduated tube full of pool water. The degree of colour change will tell you the free chlorine level. Ideal is between 1 and 2 PPM. If a spa is present, 1 to 3 PPM.