Pool Chemicals 101: What You Need To Know

Pool Chemicals 101: What You Need To Know

With so many pool chemicals out there, it can be difficult to understand what role they all play in keeping your water perfectly balanced, so we here at pHin thought we’d break it down for you in a Pool Chemicals 101 cheat sheet.


What are the most important pool chemicals?

Some of the most important pool chemicals are algaecides, sanitizers, pH balancers, alkalinity balancers, hardness balancers, and pool shock.


What do these pool chemicals do?

Algaecides are used to stop algae from growing in your pool and to prevent outbreaks from happening in the first place.

Sanitizers are arguably the most important chemical you can use to kill off bacteria and keep viruses, algae, and other contaminants from forming in your water. The two most common sanitizers are chlorine and bromine.

pH balancers are used to maintain a healthy pH range in your pool, which is critical to its overall health.

Alkalinity balancers are used to maintain a safe total alkalinity range for a comfortable swimming experience.

Hardness balancers are meant to keep your swimming pool in the optimal 200 – 300 ppm range of Calcium Hardness.

Pool Shocks are used to clean your pool when its sanitizer is overworked, after heavy rainfall, or after a large volume of people have been in it  (e.g. a pool party). Shocking your pool eliminates bacteria without shifting your chlorine levels and goes a long way towards keeping it balanced. It can be easy to forget to shock your pool, but pHin automatically reminds you to do it as needed.


An important thing to keep in mind when it comes to pool chemicals is that you need to use test strips at home or take a water sample to your local pool store to determine which ones you need at any given time. This can be exhausting, complicated, and frustrating, but thankfully these days there are digital pool test kits like pHin to help make balancing your pool water a lot easier.


Why are pool chemicals necessary?

As a pool owner, it’s your duty to use proper chemical care to maintain a healthy body of water for yourself and your guests. An unhealthy pool can lead to health problems and cause pain to those who come in contact with it.

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