Last Updated: May 26, 2021
If you have discovered that your pool’s alkalinity is too high, you may be wondering how you can bring it down. You may also be concerned about what might happen from having pool alkalinity that is too high and if there are any safety risks.
Keep reading while we get to the bottom of these questions and also discuss the steps required to lower your pool’s alkalinity.
High alkalinity can throw off your pH and can lead to cloudy water due to too much calcium in the water. In extreme cases, it can lead to mineral deposits, called scaling, to occur in your pipes. This condition can also cause the pressure in your pump to increase, and it can even block your filter.
The most common side effect of alkalinity that’s too high is itchy skin and burning eyes, and it’s not too hard to get it under control.
It’s not hard to check the alkalinity of the pool water and only requires using a test strip. Test strips are easy to obtain, and most brands will give you both the alkalinity and pH level of your pool. Once you check the alkalinity, if It reads high, you will need to bring it down.
Make sure to check your alkalinity often because it can change quickly due to rainfall and refilling your pool. It can also vary due to sunscreen and other lotions in the water.
To reduce the alkalinity of your pool, you can use either sodium bisulfate or muriatic acid. Before you use either of these chemicals, stop the pump, and let your pool settle down for several hours. Allowing the currents in the water to stop will help prevent the acid from affecting the pH of your pool.
You usually purchase sodium bisulfate in a powder form, and of the two chemicals, this is slower acting.
Before using this chemical check, the packaging to get an idea of how much you should use. We recommend starting with half the recommended amount.
Muriatic acid is a liquid, and it’s quite a bit stronger than sodium bisulfate. Extra care will be required if you choose to go with this chemical. However, it is much more effective, and you’ll need a smaller amount. The restrictions for using muriatic acid are practically the same as those for sodium bisulfate.
Once you have your alkalinity within acceptable levels, you’ll have to check in often. There are many reasons why your water might become more alkaline, and if you need to reduce it, something must be occurring. Lots of rain can often be a significant factor, as can filling your pool after it’s been low. City water is usually very alkaline. Chlorine can also increase alkalinity, especially if you keep your chlorine levels high.
Shocking your pool is sure to raise the alkalinity. Excessive swimming can also increase the alkalinity, so you need to test your pool and adjust accordingly. He suggested once a week, if not every day or two, the faster you notice a problem, the easier it is to fix it.
We hope you have enjoyed reading and learn some new ideas about how to lower your pool’s alkalinity. We recommend starting with the sodium bisulfate, especially if you’re not safety-minded or careful with your measurements. It will take much more sodium bisulfate to lower the alkalinity, so there is much more room for error. However, if you are careful and take precautions, you might enjoy muriatic acid’s powerful effects and smaller footprint in your storage area.
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Featured Image Credit: Boris Mrdja, Shutterstock
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