301 S. Princeton Ave

Wenonah NJ 08090 

(856) 357-3373

 Pool Chemistry

There are 2 basic elements to pool chemistry: water balance and sanitation.

Water Balance

Your pool water is delicate, and in order to reach perfect pool harmony, it must be balanced.

Balancing your pool means keeping the pH of the water between 7.4 and 7.6, which is slightly above neutral on the pH scale.

There are 3 main ingredients to keeping this balanced: pH, alkalinity and calcium hardness.


Proper pH is 7.4-7.6. 

pH alone is unstable. Rainwater, swimmers, and just about anything that enters the water can affect the pH level. When pH is low, it means your water is acidic, and when it’s high, you water is basic.

To give you an idea of how pH works, our tears are pH neutral. If they had a low pH, it would burn when we cried. And if the pH was high, it would dry out our eyes.

Always keep a good supply of pH Increaser on hand because this reading can change frequently.


Proper Alkalinity Level: 100 to 150 ppm

Alkalinity is a pH buffer, meaning it helps to keep the pH from drastically moving up and down the pH scale by absorbing major changes to the waters before affecting the pH.

Calcium Hardness

Proper Calcium Hardness Level: 175 to 225 ppm and 200 to 275 ppm for plaster pools

Without calcium, your water will become hungry for it and seek to fulfill it’s appetite by feasting on your pool’s plaster, and anywhere else it can get it.

How To Balance your Pool Water

It’s important to keep your eye on your pH and alkalinity levels – at least once a week – by using a home test kit or test strips.

To keep your pool balanced, you need to keep these chemicals on hand:

pH Increaser
pH Reducer
Alkalinity Increaser

You’ll notice I didn’t mention alkalinity decreaser. Most major pool chemical companies do not produce it and here’s why…

If your pH and alkalinity are low, alkalinity increaser will raise both. You may need to add a little pH increaser if the pH doesn’t reach 7.4 – like fine tuning an instrument.

If your pH and alkalinity are both high, pH decreaser will lower both.

If just your alkalinity is high, your pH will also be high and you can use pH decreaser.

If your pool is properly balanced at all times, it will make your pool’s sanitizer work more effectively – especially chlorine.


The most common form of pool sanitizer is chlorine, but there are others you can use, including:

Bromine: chlorine’s halogen cousin
Biguanide: Baquacil or SoftSwim
Minerals: silver and copper


 Proper Chlorine Level: 1 to 3 ppm

Chlorine is an extremely effective bacteria and algae killer, and cost effective.

There are a few ways you can introduce chlorine into the pool water, including:

  • Chlorine tablets

  • Chlorine granular or powdered chlorine

  • Salt Chlorine Generator: turns regular table salt into chlorine

Chlorine tablets are the most popular form. They come in 3” and 1” tablets and can be added to a floating chlorine dispenser, a chlorinator, or the skimmer basket(s) in your pool.