Chemical 101: Chlorine

Written by
Orca Pacific
Published on
March 11th, 2024

Chlorine stands as a stalwart guardian in the realm of pool maintenance, silently ensuring the safety and cleanliness of our swimming environments. This potent chemical compound plays a pivotal role in safeguarding against harmful bacteria and algae, making it an indispensable asset in the upkeep of pool water hygiene.



1. Purpose


The primary purpose of pool chlorine is to kill bacteria, viruses, and algae in the pool water, preventing the spread of waterborne illnesses and maintaining water clarity.



2. Forms of Chlorine


✅Chlorine Tablets: Slow-dissolving tablets or pucks placed in a pool's skimmer or automatic chlorinator.

✅ Chlorine Granules: Quick-dissolving granular chlorine.

✅ Liquid Chlorine: A liquid form of chlorine that can be added directly to pool water.

✅ Salt Chlorination: Salt is converted into chlorine through a salt chlorinator system.

✅ Stabilized and Unstabilized Chlorine: Some chlorine products contain a stabilizer (cyanuric acid) to protect chlorine from degradation due to UV light.



3. Types of Chlorine


There are two main types of chlorine used in pools:

- Free Chlorine: The active form of chlorine that kills contaminants in the pool water.

- Combined Chlorine: Chloramines, formed when free chlorine reacts with organic contaminants like sweat and urine. Combined chlorine gives off a strong chlorine odor.



4. Maintaining Chlorine Levels


To maintain pool water quality, it's important to regularly test and maintain proper chlorine levels. Free chlorine levels should generally be maintained in the range of 1-3 parts per million (ppm).



5. Superchlorination


Occasionally, you may need to "shock" the pool by adding a higher dose of chlorine (pool shock treatment) to break down chloramines and remove contaminants.



6. Risks and Safety Precautions


Chlorine can be hazardous if mishandled. Always follow safety precautions when handling chlorine products, store them in a safe place, and wear appropriate personal protective equipment when needed.



7. Salt Chlorination


Salt chlorinators use a salt cell to generate chlorine from salt in the water. This provides a continuous and automated method for chlorinating the pool.



8. Stabilizer (Cyanuric Acid)


Stabilizer, often added to chlorine products, helps protect chlorine from degradation due to UV light, allowing it to remain in the pool water longer.



9. Regular Maintenance


Regularly maintain the pool's pH and alkalinity levels to ensure chlorine remains effective. Proper water balance is crucial for chlorine to work efficiently. Pool chlorine is an essential chemical for maintaining pool water quality and safety. By regularly testing and maintaining appropriate chlorine levels, you can enjoy a clean and healthy swimming environment.



In the intricate dance of pool maintenance, chlorine emerges as an unsung hero, tirelessly safeguarding against unseen threats and ensuring crystal-clear waters for all to enjoy. As you navigate the realm of pool chemistry, remember that knowledge is your greatest asset.
Should you find yourself adrift in the depths of chlorine calculations or struggling to maintain the delicate balance of pool chemistry, know that assistance is but a call away. Contact us at Orca Pacific, where our team of experts stands ready to guide you through the labyrinth of pool maintenance with wisdom and precision. Together, we'll unlock the secrets of pristine pool water and pave the way to aquatic bliss.