Treating new pool water is an essential step to ensure healthy and enjoyable swimming. Proper maintenance from the very first fill can prevent many problems down the line. Here's a complete guide to help you effectively treat your new pool's water.
Treating new pool water is crucial for healthy and enjoyable swimming. Here are the key points to remember:
- Meticulous preparation: cleaning the pool, checking the filtration system, and testing water parameters
- Balancing parameters: adjusting pH, alkalinity, and water hardness before treatment.
- Disinfection and shock treatment: using products like chlorine, bromine, or active oxygen to sanitize the water.
- Regular maintenance: establishing a routine including filtration, weekly checks, and pool cleaning.
Preliminary steps before water treatment
Before starting the treatment itself, it's essential to properly prepare your pool. The quality of the fill water plays a crucial role in the process. If you use tap water, it's generally of good quality, but it's recommended to test it before starting treatment.
Here are the preliminary steps to follow:
- Thoroughly clean the pool and equipment
- Check that the filtration system is working correctly
- Fill the pool with clean water
- Test the water parameters (pH, alkalinity, hardness)
Once these steps are completed, you can proceed with treating the new water. Note that the water volume of your pool will determine the quantities of products to use. Make sure you know this volume precisely to adjust dosages correctly.
Balancing water parameters
Balancing water parameters is the first step in treatment. A good balance optimizes the effectiveness of disinfectant products and prevents common problems such as cloudy water or algae. The three main parameters to monitor are pH, alkalinity, and water hardness.
Here is a summary table of the ideal values to aim for:

To adjust these parameters, use specific products such as pH+ or pH- for pH, TAC+ for alkalinity, and calcium for hardness. Carefully follow the manufacturer's instructions for dosage. Once equilibrium is achieved, let the filtration run for at least 24 hours before moving to the next step.
Disinfection and shock treatment of new water
Disinfecting new water is a crucial step to eliminate potentially present microorganisms and prevent their proliferation. Shock treatment involves introducing a significant dose of disinfectant to quickly sanitize the pool water.
The most commonly used products for disinfection are:
- Chlorine (in tablet, granular, or liquid form)
- Bromine (an alternative to chlorine, particularly suitable for warm water)
- Active oxygen (a milder solution for sensitive skin)
For effective shock treatment, it's recommended to use a chlorine dose approximately 10 times higher than the usual maintenance dose. For example, if your pool normally requires 2 ppm of chlorine, perform a shock treatment with 20 ppm. Then, let the filtration run continuously for 24 to 48 hours.
Remember to regularly check the disinfectant level using a test kit. Once the level has dropped to a normal value (between 1 and 2 ppm for chlorine), you can start using your pool.
Maintaining long-term water quality
After the initial treatment of new water, it is essential to establish a maintenance routine to maintain water quality in the long term. This routine includes several important aspects:
Regular filtration: Run your filtration system for at least 8 to 12 hours a day during periods of use. The duration may vary depending on water temperature and pool traffic.
Weekly parameter checks: Regularly test the pH, alkalinity, and disinfectant level. Adjust them as necessary to maintain water balance.
Pool cleaning: Regularly use a robotic cleaner or pool brush to remove debris and prevent algae formation. Don't forget to clean the waterline to avoid limescale deposits.
Preventive treatment: Use algaecides and flocculants to maintain crystal-clear water and prevent the proliferation of microorganisms.
By following these tips and adopting a rigorous maintenance routine, you can enjoy healthy and clear pool water throughout the season. Don't hesitate to consult a professional if you have any doubts or persistent problems with your water quality.

