Pool Chemicals: How to Choose and Use Effectively

pool chemicals

Maintaining a clean and safe swimming pool requires more than just regular cleaning and filtration. Using the right pool chemicals is essential to keep the water sanitized and balanced. With a plethora of options available in the market, choosing suitable chemicals for your pool can be overwhelming. In this blog, we will explore the different types of pool chemicals, discuss how to choose them wisely and provide guidelines on their effective usage.

Understanding Important Pool Chemicals


1. Chlorine

Chlorine is the most common and widely used pool chemical for disinfecting the water. It effectively kills bacteria, algae, and other harmful microorganisms. Both liquid and granular chlorine are available, providing different methods of application. Liquid chlorine is typically poured directly into the pool water, while granular chlorine is pre-dissolved before being added. When choosing chlorine, consider the size of your pool and the chlorine concentration required to maintain proper sanitation.

2. Bromine

Although less commonly used than chlorine, bromine is a suitable alternative for sanitizing pools, especially indoor or hot tub pools. It comes in tablet or granular form and is well-known for its long-lasting effect and stability at high temperatures. Bromine is particularly effective in killing bacteria and viruses, making it an excellent choice for spas and hot tubs.

3. pH Adjusters

Maintaining the correct pH level is vital for pool water balance. The pH scale ranges from acidic (below 7) to alkaline (above 7), with 7 being neutral. The ideal pH level for pool water is slightly above 7. If the pH level is too low, the water becomes acidic, which can cause skin and eye irritation. On the other hand, high pH levels lead to scale formation and make chlorine less effective. pH adjusters are chemicals used to raise (pH increaser) or lower (pH decreaser) the pH level as needed.

4. Algaecides

Algae growth is a common problem in swimming pools, especially during hot and humid weather. Algaecides are used to prevent and destroy algae, ensuring the pool remains clear and aesthetically pleasing. They come in various forms, including liquid, granular, or tablet. When selecting an algaecide, consider the type of algae present and follow the manufacturer’s instructions on application.

5. Calcium Hardness Adjusters

Calcium hardness refers to the amount of dissolved calcium in pool water. Proper calcium hardness is crucial to prevent corrosion or scale formation on pool surfaces and equipment. Calcium hardness adjusters are used to raise or lower the calcium levels as needed. Use a test kit to measure the calcium hardness before adjusting it, as different pools may require different levels depending on factors such as water source and pool material.

6. Stabilizers

Stabilizers, also known as cyanuric acid, are essential for protecting chlorine from degradation due to sunlight exposure. They help maintain the chlorine’s effectiveness, reducing the need for frequent dosage adjustments. However, excessive stabilizer levels can hinder chlorine’s sanitizing power, so it’s crucial to maintain the right balance. Regular testing of stabilizer levels is necessary to ensure optimal pool water conditions.

Choosing Pool Chemicals Wisely


1. Understand Your Pool’s Size and Usage

The first step in choosing the right pool chemicals is understanding your pool’s size, usage pattern, and purpose. The chemical requirements of a small residential pool may differ from those of a large commercial pool. Determine the average number of swimmers, whether it is an indoor or outdoor pool and the frequency of use. This information will guide you in selecting the appropriate chemicals and dosage requirements.

2. Consider Water Source and Quality

The water source used to fill your pool can significantly impact its chemical balance. Different regions have varying water compositions, with variations in minerals and impurities. If you have well water or use municipal water, it’s advisable to test its chemical composition before adding it to the pool. Testing will help determine whether additional chemicals, such as water clarifiers or sequestrants, are required.

3. Read Product Labels and Follow Instructions

When purchasing pool chemicals, carefully read the product labels and instructions provided by the manufacturer. The labels contain crucial information on proper usage, dosage requirements, safety precautions, and potential hazards. Adhering to these guidelines is critical for effective and safe pool chemical usage. Failure to follow instructions can lead to inadequate sanitization, chemical imbalances, or even harm to swimmers.

4. Seek Professional Advice

If you are unsure about the specific pool chemicals required or how to effectively use them, consider seeking professional advice from a pool maintenance specialist or water treatment professional. They can provide personalized recommendations based on your pool’s unique characteristics and help maintain optimal water quality. Professional advice is especially beneficial for commercial pools or those experiencing persistent chemical imbalances.

Using Pool Chemicals Effectively


1. Test Pool Water Regularly

Regular testing of pool water is essential for maintaining optimal chemical balance. Test kits, available at pool supply stores, can measure various parameters such as pH, chlorine/bromine levels, total alkalinity, and calcium hardness. Aim to test your pool water at least once or twice a week and after significant weather changes or heavy pool usage. Monitoring chemical levels will help identify and address any imbalances promptly.

2. Follow Recommended Dosage

Pool chemicals should always be added according to the manufacturer’s recommendations. Overdosing or underdosing can lead to chemical imbalances and ineffective sanitization. Use measuring cups or spoons specifically designated for pool chemicals to ensure accurate dosage. Remember, chemical reactions take time, so allow adequate time for the chemicals to disperse and distribute in the pool water before retesting or adding more.

3. Practice Proper Handling and Storage

Pool chemicals should be handled cautiously to ensure safety. Wear appropriate protective gear, such as gloves and goggles when handling concentrated chemicals. Store them in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and flammable materials. Keep them out of reach of children and pets, and never mix different chemicals unless instructed to do so.

4. Maintain Routine Cleaning and Filtration

While pool chemicals play a crucial role in maintaining water quality, they are not standalone solutions. Regular cleaning and filtration are equally important. Skim the pool surface, vacuum the bottom, and clean the pool walls regularly to remove debris and prevent the buildup of algae or other contaminants. Maintain the pool’s filtration system according to the manufacturer’s recommendations for optimal circulation and filtration efficiency.

Contact Us Today

Choosing and using pool chemicals effectively is vital for maintaining clean, safe, and inviting swimming water. Understanding the different types of pool chemicals, considering your pool’s unique needs, and following proper usage guidelines are essential steps in achieving optimal water quality. Remember to test your pool water regularly, adhere to recommended dosages, take necessary precautions during handling, and maintain routine cleaning and filtration practices.

Maintaining a crystal-clear pool requires proper knowledge and the right pool chemicals. If you’re looking for expert pool maintenance services and high-quality pool chemicals, trust Ajax Pool & Spa. Contact us today and explore our range of services and products. Let us help you keep your pool in pristine condition for a summer full of enjoyment.