How to Lower pH in a Pool

How to Lower pH in a Pool

As summer approaches, the scorching hot and humid summer days are once again upon us. I am sure you know the days I am talking about. 95 degrees with a 100% chance of humidity, not a cloud in sight… the perfect day for swimming. The perfect days for swimming also lead to needing to know how to lower pH in a pool.

As a previous pool owner, I understand the frustration of waking up in the morning and walking outside to check the pH level on the pool only to find out that it is too high and you are unable to swim on that warm summer day. As a pool owner, you most likely know the correct pH levels that need to be kept in order to have a fun day filled with swimming. Sometimes it is a bit hard to manage so luckily, there are a few ways that you can lower the pH level in your pool.

1. Sodium Bisulfate

Sodium Bisulfate can be used to help lower the pH level of any pool whether it be indoor or outdoor. Rather than coming in liquid form, sodium bisulfate comes in a powder that is very dry. Considering that sodium bisulfate is a dry powder, it is important to know where to put it in your pool in order to maximize your chances of lowering the overall pH.

You will know how much to add once you tested the pH level. The best place to add sodium bisulfate is by the pool filter. The pool filter is the best location as it is located near the jet of the pool which will allow the sodium bisulfate to be spread around. Before checking the pH level of your pool again, allow the sodium bisulfate to settle for at least half of the day to impact the current pH level.

2. Sulphuric Acid

Sulphuric Acid is another way to lower a pool’s pH level. Sulphuric Acid tends to not be as environmentally friendly as other options so it may not be your first choice as a pool owner. When it comes to lowering a pool’s pH level with sulphuric acid the procedure is the same as it would be with sodium bisulfate aside from two key differences.

The first difference is that you will be able to test your pH levels within five hours of putting the sulphuric acid in your pool. The second difference, and at times a downfall is that as mentioned before, sulphuric acid is not the most environmentally friendly meaning that it is extremely important to wear protective gear when handling it as it can be hazardous.

The protective gear that is recommended would be chemical-resistant gloves. Along with wearing gloves, you should also think about wearing a long shirt, long pants, and closed-toed shoes in case any amount of sulphuric acid drops on you when using it.

3. Muriatic Acid

Muriatic Acid is another way to lower pH levels in indoor and outdoor pools. The testing process is very similar to the one described under sodium bisulfate. A major difference between the two is that sodium bisulfate is a dry powdery acid compared to muriatic acid which comes in a liquid form. As mentioned, the testing process is the same as sodium bisulfate and the acid should be placed near the jet to be spread around the pool.

If the muriatic acid is not placed near the jet of the pool, there may be a chance of the acid not balancing as well with the other chemicals in the pool due to the acid being stronger in one area compared to another. An important thing to know with muriatic acid is that you will be able to test the pH level within five hours, and if the pH is still too high you can add more muriatic acid as needed.

How to Lower pH in a Pool: Conclusion

The goal for the hot summer days is to stay as cool as possible. Hopefully, these tips on how to lower your pH levels are beneficial to you. Some last-minute reminders are as follows; always check the pH in your pool before swimming, even when you have previously checked the pH levels the day before. It is important to be proactive and constantly check your pool pH level so you know that it is safe to enjoy your day of swimming.

If you don’t have a pool testing kit, you will be able to find one online or at your local pool store. The pool testing kit is quite self-explanatory and informs you about the correct pH level for your pool whether it is an indoor pool or an outdoor pool. Lastly, remember to always take precautions when handling the chemicals, and to keep the pH low enough so you can have some fun in the sun on those scorching hot and humid summer days.

Written by: Rachel Clifton

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