How to SLAM Your Pool: The Ultimate Guide to Clear Water

Your plan to host a pool party for your friends goes down the drain when the sight of a green, cloudy pool comes into view. A green pool is just an indication of an imbalanced pool water chemistry. The SLAM (Shock, Level, and Maintain) method is what you need to restore your pool clarity. This blog will help you learn how to SLAM pool step-by-step in detail.

What Is the SLAM Method for Pools? 

SLAM represents Shock, Level, and Maintain. It is a total cleaning process for the pool and the clarity of the water. It helps eliminate algae, bacteria, and other contaminants. Trouble-Free Pool popularized it and is a popular method of pool maintenance. Here’s an overview of the SLAM method pool:

• Shock: Referring to bringing the chlorine level in the pool to a concentration that is higher than its normal operating levels. The high chlorine concentration quickly disinfects the water of any algae, bacteria, and other suspended materials in the pool. 
• Level: The level of chlorine after shock is important as it prolongs the duration of exposure against algae and bacteria. 
• Maintain: This means maintaining the shock level through periodic chlorine level testing until all visible algae and contaminants are gone.

Step-by-Step Guide to SLAM Your Pool 

Here’s a step-by-step process of the pool SLAM method, so make sure to follow each step clearly.

Step 1: Test Your Pool Water

Test your pool water. You should use a reliable pool testing kit and test for chlorine, pH, alkalinity, and cyanuric acid (CYA) levels. 

Step 2: Calculate and Add Shock

Based on the CYA levels, choose the ideal amount of chlorine so that you may not overdose or underdose your pool. You may get a better idea with a SLAM chart or a calculator.

If your CYA level is below 30 ppm, refer to the SLAM chart for the amount of stabiliser to be added to bring your CYA level back to 30 ppm. If your CYA level reads above 70, drain the water to lower it. If it falls between 30 ppm and 70 ppm, proceed to the next step.

You should ideally prefer liquid chlorine or a calcium-free shock product.

Step 3: Balance Pool Chemistry

Ensure that all other aspects of water chemistry in your pool are balanced. The pH should range from 7.2-7.6, CYA from 30-50 ppm, and alkalinity should be from 80-120 ppm. If the pool's pH level is high, adjust it using muriatic acid; if it is low in alkalinity, raise it by adding baking soda.

Step 4: Maintain and Filter

Keep the pump running for at least 24 hours a day, 7 days a week. Brush the walls of the pool and vacuum out the debris. Monitor the chlorine levels and maintain them between 5-10 ppm until the water is almost clear. Test the free chlorine repeatedly to keep it in check.

Step 5: Verify Success

Once the process is complete, verify whether the SLAM method has been successful or not. If your water appears clear and chlorine remains stable overnight without combining, you’ve been successful. 

Common SLAM Mistakes to Avoid 

Many pool owners make several common mistakes when doing the SLAM method. These are:

• Using a wrong and unreliable test kit, such as typical test strips. Instead, use liquid test kits, which accurately determine CYA and chlorine levels.
• Using a SLAM chart is essential, as many people tend to undershock or overshock their pools, resulting in chaos. It is recommended to refer to the SLAM chart or calculator to determine the appropriate shock treatment amount.
• Stopping SLAM way too early, even before the water is obvious. The key is to ensure water becomes crystal-clear, passes the overnight chlorine test, and no combined chlorine is left behind. Additionally, the pool must be free from algae and bacteria. Then only is the SLAM method successful. 

Conclusion

If you are tired of stubborn algae and never-ending cloudiness, SLAM is the method of choice. SLAM is the most effective and the best way to make your pool pristine, sparkling, and algae-free. It eliminates bacteria, removes cloudiness, banishes green water, and makes your pool ideal for swimming. So if you want to make your pool look brand-new, try the SLAM method and see the results for yourself.

FAQs About the SLAM Method for Pool Maintenance

How long does it take to SLAM a pool?

The time to SLAM a pool depends on the severity of algae or cloudiness. Typically, it takes 2-7 days. Severely green pools may require longer, while consistent testing and maintenance can speed up the process. Run your pool pump 24/7 to ensure faster results.

Can I swim in my pool during the SLAM process?

No, you should not swim during the SLAM process. The high chlorine levels (5-20 ppm) used to kill algae and bacteria are unsafe for swimming. Wait until chlorine drops to 1-3 ppm and the water is clear.

Do I need a special test kit for SLAM?

Yes, a reliable test kit like the Taylor K-2006 or TF-100 is essential for accurate results. These kits measure chlorine, pH, alkalinity, and CYA precisely, unlike test strips, which can be inaccurate during SLAM.

Why is my pool still cloudy after starting SLAM?

Cloudiness may persist if chlorine levels are too low, CYA is too high, or filtration is inadequate. Test frequently, maintain the correct chlorine level for your CYA, and ensure your pump runs continuously. Brushing and vacuuming also help remove debris.

Can I use pool store chemicals for SLAM?

You can, but liquid chlorine (sodium hypochlorite) or calcium-free shock is recommended for cost-effectiveness and to avoid adding stabilizers. Avoid algaecides or specialty chemicals, as SLAM relies on chlorine and balanced chemistry to work effectively.