Leslie's Pool Supplies | Pool Chemicals & Water Treatment (2024)

Pool Chemicals - More Information

Balancing your pool and spa water is one of the most important aspects of being a pool owner. Maintaining proper water balance ensures that the bathers and swimmers in your pool or spa are being protected from bacteria, microorganisms, pathogens, and protozoa that can potentially cause harm to those that are using the pool or spa area. Below is a list of the elements of water that should be tested regularly.

  • Free Available Chlorine - Free available chlorine represents the amount of chlorine that is capable of sanitizing.
  • Total Available Chlorine - Total available chlorine represents the combined amounts of free available chlorine and combined available chlorine.
  • pH - pH is the measure of how acidic or basic the water is.
  • Alkalinity - Total alkalinity is the buffer for the resistance to change for the pH in the water.
  • Calcium Hardness - Calcium hardness is the amount of calcium that is in the water. Too high or low levels can lead to adverse effects.
  • Cyanuric Acid - Cyanuric Acid often referred to as conditioner or stabilizer, is a chlorine protectant, designed to protect the chlorine molecules in your pool from the harmful effects of UVA and UVB rays. To put it simply, cyanuric acid acts as a sunscreen for your chlorine. Iron - Iron is an element commonly found in fertilizers. Having too high of an iron level can cause staining and severe discoloration of surfaces in the pool.
  • Copper - Copper is an element commonly found in certain algaecides and heat exchangers. When copper is present in the water, it makes the non-living organic material in the water more susceptible to chlorine sanitization. Having too high of a copper level can cause staining and severe discoloration of surfaces in the pool.
  • Phosphates - Phosphates are a nutrient source for algae. Maintaining a low phosphate level ensures a low probability of algae blooms.
  • Total Dissolved Solids - Total dissolved solids refers to the measure of the amount of chemical and other outside variables dissolved in the water.

To test the above elements, you can use either test strips, a droplet reagent kit, or a water testing device. Once the water is tested, it’s important to take note where the water balance needs to be adjusted and then make the adjustments by using the correct pool chemicals. Below is a brief description of the main chemicals used to treat pool water.

Chlorine

Chlorine Tablets are designed to maintain chlorine residual for proper sanitization of the water. Comes in 3” and 1” tablet sizes for a variety of applications. Pool Chlorine Tablets are the most commonly used primary sanitizer on the market. Chlorine tablets slowly dissolve and kill viruses, bacteria, and control algae, making them one of the easiest and most effective methods available.

Pool Shock

There are three types of Pool Shock that we have available to quickly treat and maintain the chlorine sanitizing level in pools and spas.

  • Calcium Hypochlorite Shock — Leslie’s Power Powder
  • Sodium Dichlor Granular Chlorine Shock — Leslie’s Chlor Brite
  • Chlorine Free Oxidizing Shock — Leslie’s Fresh ‘N Clear
Bromine

Bromine is an alternative sanitizer used in spas and hot tubs. Bromine doesn’t require stabilization which means it's better suited for hot and warm water environments.

Water Balancers

Water Balancers are used to raise and lower pH, Alkalinity, Calcium Hardness, and Cyanuric Acid.

Natural Chemistry

Natural Chemistry a wide range of products from phosphate removers, enzymes, sequestering agents, chelating agents, and many more. Some of the more popular products include Pool Perfect, Pool Perfect + Phosfree, Metal Free, and Instant Conditioner.

Alternative Sanitizers

There are other alternatives pool sanitizers available to use instead of chlorine tablets in pools and spas. UV and mineral sanitizing systems are effective at sanitizing the water while reducing the amount of chlorine that is normally required.

Specialty Pool Chemicals

Specialty chemicals include clarifiers, algaecides, phosphate removers, stain removers, cleaning chemicals, and more.

Algae Control

Pool Algaecides and algae control chemicals are designed to make algae more susceptible for chlorine to sanitize it out of the water.

Pool Chemical Kits

Our kits and bundles are designed to open and close pools and spas of various volumes of water easily.

Water Test Kits

Regular water testing is an essential part of maintaining your pool’s welfare. Getting an accurate reading of your water chemistry helps you understand exactly how much of what product your pool needs. Testing your pool water prevents the possibility of under-treating or over-treating the water, which keeps your pool properly balanced and saves you money!

Learn More About Pool Chemicals and Water Chemistry
  • Pool Chemistry 101
  • How to Balance Pool Water
  • How to Clear Cloudy Pool Water
Leslie's Pool Supplies | Pool Chemicals & Water Treatment (2024)

FAQs

What pool chemicals should not be added at the same time? ›

You should not add certain pool cleaning chemicals simultaneously because they can react and cause dangerous chemical reactions. Here are some examples: Liquid Chlorine and acid (such as muriatic acid or sulfuric acid) Shock treatments and acid.

What is the best pool water treatment? ›

Chlorine is the most popular treatment for keeping swimming pool water chemistry balanced because it's highly effective and relatively low cost. Other disinfectants include bromine, ozone, and ultraviolet (UV) radiation.

What chemicals do I put in my pool when I first fill it up? ›

During pool start-up, there are numerous chemicals that you should add to your pool water, the primary of which include:
  1. Scale and stain solution.
  2. Alkalinity increaser.
  3. pH increaser or decreaser.
  4. Calcium hardness increaser.
  5. Chlorine tablets.
  6. Shock chlorine.
  7. Cyanuric acid.
  8. Algaecide.
May 15, 2023

Does Leslie's pool supply test water? ›

We offer free in-store AccuBlue® water testing at all store locations.

What is the golden rule when using pool water chemicals? ›

The simplest strategy is to follow them, remembering the two golden rules of adding chemicals: only add chemicals to a pool that is running, and only add chemicals to water, not water to chemicals.

What chemical can ruin a pool? ›

Petroleum-Based Products.

Some pool advice that has circulated over the years is that certain types of petroleum – like vaseline – can be used to oil the o-rings in a pool's filter. However, any petroleum-based product will eventually destroy both your o-rings and filter and should never be used.

What are the strongest pool chemicals? ›

More
  • Best Overall: HTH Pool Care Shock Advanced » ...
  • Best Budget: Austin's Pool Tech Pool Shock » ...
  • Best Fast-Acting: BioGuard Smart Shock » ...
  • Best for Algae Prevention: In the Swim Calcium Hypochlorite » ...
  • Best for Saltwater Pools: Clorox Pool&Spa Salt Essence Chlorine-Free Shock Oxidizer »
Apr 12, 2024

Should I use algaecide or chlorine in my pool? ›

Chlorine shock is usually the best way to get rid of green algae. However, an algaecide may become necessary if you're fighting more chlorine-resistant algae, such as mustard algae or black algae. Even then, the pool algaecide should work with chlorine or other sanitizers – not as an alternative to them.

Do you shock your pool when you first fill it up? ›

Shocking a pool is something that every pool owner will have to do at least once a year. This is done usually when the pool is opened to help clear up the water. Shocking a pool can is how you eliminate algae or rapidly raise the chlorine level of your pool water to combat a green pool.

Should pool pump run when adding chemicals? ›

Another time to think about running your pump is when you add chemicals. For instance, when you shock your pool, you should do it at night so the sun won't burn off the chemicals. And that means you will run your pool pump at night after shocking it so it can distribute the chemicals in your pool.

How soon after filling a pool can you swim? ›

Chlorine/non-chlorine chemicals – When adding chlorine or non-chlorine chemicals to “shock” your pool after a fill-up, wait about 24 hours or until levels are approximately 5 ppm. If you'll only be adding liquid chlorine, it's generally safe to swim after about 4 hours or until levels are 5 ppm or lower.

Should the pump be running when testing pool water? ›

Ensure your pump is running when you test your water and get a sample that's around 50cm into the pool, rather than on the surface. For best results, don't get the sample near the returns or chlorine dispensers if any.

What is the most important test for pool water? ›

Best Ways to Test Pool Water

Whether you use a kit or a strip, it should measure chlorine and pH levels. These measurements show two of your pool's most important chemical readings. It's best to find a kit or strips that also measure total alkalinity and total hardness.

Can I add pool chemicals at the same time? ›

You should never mix your chemicals together and to start with you should first conduct a water test to ascertain which chemicals are required. Start by balancing your pool if required, by adjusting the total alkalinity.

Is it okay to add shock and algaecide at the same time? ›

It Should Not Be Done Together

This is because when you mix chlorine and algaecide together, it renders both of them useless. Hence, you should first shock the pool and wait for the chlorine levels to fall below 5 PPM. Only then should you introduce algaecide to get the best results.

Can you put acid and chlorine in a pool at the same time? ›

Chlorine & Acid

Perhaps most important of all — NEVER add chlorine and muriatic acid or Dry Acid together, whether outside the pool or in it. This creates a dangerous toxic gas that can have severe health consequences if inhaled. Don't ever shock the pool immediately after adding acid to the water.

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