Why Are My Chlorine Tablets Dissolving So Fast?

Chlorine Tablet 10 lbs 1" Mini tabs by Swim Clear Discount Pool

The Importance of Chlorine in Pool Maintenance

Chlorine is an essential chemical in maintaining the cleanliness and safety of swimming pools. It is used to kill harmful bacteria and viruses that can cause skin and respiratory infections. Chlorine tablets are a popular form of pool chemical because they are easy to use and dissolve slowly, releasing chlorine over time.

The Problem of Fast Dissolving Chlorine Tablets

However, some pool owners have reported that their chlorine tablets are dissolving too fast, which can lead to over-chlorination and potentially harmful swimming conditions. There are several reasons why this might be happening.

High Water Temperatures

One of the most common causes of fast-dissolving chlorine tablets is high water temperatures. When the water is warm, the chlorine dissolves more quickly, which can lead to an imbalance in the chemical levels of the pool.

Low pH Levels

Another possible cause of fast-dissolving chlorine tablets is low pH levels. If the pH is too low, the water becomes acidic, which can cause the chlorine to break down more quickly.

Low Stabilizer Levels

Stabilizer is another important chemical in pool maintenance that helps protect the chlorine from being broken down by sunlight. If there is not enough stabilizer in the pool, the chlorine tablets may dissolve too quickly.

Incorrect Tablet Placement

Finally, it is important to make sure that the chlorine tablets are placed in the correct location in the pool. If they are placed too close to the pool walls or in the skimmer basket, they may dissolve too quickly and cause over-chlorination.

Solutions to the Problem

If you are experiencing fast-dissolving chlorine tablets, there are several solutions that you can try:

Adjust Water Temperature

If the water temperature is too high, try lowering it to slow down the dissolution of the chlorine tablets.

Balance pH Levels

Make sure that your pool’s pH level is within the recommended range of 7.2-7.8 to prevent the chlorine from breaking down too quickly.

Check Stabilizer Levels

If you suspect that stabilizer levels are low, test the water and add more stabilizer if necessary.

Reposition Chlorine Tablets

Make sure that the chlorine tablets are placed in a floating dispenser in the center of the pool to ensure even distribution and slow dissolution.


Fast-dissolving chlorine tablets can be a frustrating and potentially dangerous problem for pool owners. By understanding the potential causes and implementing the solutions outlined in this article, you can ensure that your pool remains safe and properly maintained all summer long.