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.

Algae is attracted to bacteria and parasites. These microbes can enter the body through the nose, eyes, ears, mouth, or a tiny cut. In this situation, it is less safe to swim in green pool water. This is why regular chemical testing is so important.

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”).