What Should Pool Water Ph Be? [Answered!]

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Water from a pool deserves careful consideration. The right pool water ph balance can make or break your pool’s chemistry. Too much or too little ph can ruin your pool’s quality and make it dangerous for you to swim in. Knowing how important water quality is and how easily it can be spoiled, it’s essential to monitor your pool’s water ph and adjust it frequently. That’s why it’s important to find out what should put the ph in your pool water: fertilizers, chemicals, rainwater, or just plain old water treatment systems? Let’s see how.


Adding fertilizers to your pool water can significantly increase the growth of algae and other unsightly plants in your pool. While a lush, green pool is certainly appealing, too much algae can clog up your pool filters and even your tank. Fertilizers also make your pool water more acidic which can damage the calcium carbonate in your pool’s shell. Aside from these two problems, too much fertilizer will also encourage more weeds to grow in your pool which you may find when you’re doing your weekly cleaning. If fertilizers are necessary in order to see nice plants blooming in your pool, then they’re necessary. Just don’t add too much as too much fertilizer will only do harm.


Chemicals in your pool water can do a number of things. First, they can kill algae and other plants, which in turn reduces the need for fertilizers. Second, chemicals can make your pool water more stable and safe for swimming. Alkaline chemicals in particular can help neutralize the acidity caused by organic matter (such as feces) and can help keep calcium carbonate in your pool’s shell at a stable level. As you can see, chemicals are a necessary part of a good pool environment. However, too much chemical treatment in your pool can cause issues of its own. If you’re not careful, your pool might become dangerously acidic or alkaline, which can pose risks to your health. Some of the chemicals that you might add to your pool water are sulfur, chlorine, and fluorine.


Another important point to make about pool water is that much of it is simply old water that has been sitting around for some time. The more time that water spends in your pool, the more germs it will collect. If you’re regularly watering your pool and the water is still relatively fresh, then you may not need to add any chemicals to it besides some chlorine for some basic disinfection. However, if the water has sat around for a while and you suspect that it might be contaminated with feces or other germs, then you may want to consider using a pool shower or similar device to rinse it before using it again. Having rinsed pool water more than once or twice won’t hurt either as long as there are no signs of germs left behind. If you’re not sure whether or not the water in your pool has been sat around for long enough to become contaminated, then just take a quick swig and see if you can taste any difference. If you can’t, then it’s probably time to get the water tested and find out what’s in it.

Water Treatment Systems

If the water in your pool has become a little salty (which may happen if it is near an ocean or large lake) then it may be time to consider a water treatment system. These are devices that are specifically designed to filter the water in your pool and remove most of its chemicals and dirt. Depending on the setup of your particular system, you may need to replace some of the water in your pool with fresh drinking water. If you live near an ocean, then you may also need to consider purchasing a water tank that is specifically designed to accumulate and hold all the fresh water that you will need for your daily activities. Of course, if your pool is large then you may not have any problems holding back some fresh water to meet your needs. If your pool is small then you may need to get creative in how you get your water to drinkable levels. Another important point to make about water treatment systems is that if your water is clear, then it’s time to change your pool’s filter. Your manufacturer will usually tell you when it’s time to change the filter based on the amount of time that it has been since the last time that you cleaned it. For example, if it’s been more than six months since you cleaned it, then it’s time for a new filter.

Shellfish/Fish Tank Mortality

The other important point to make about pool water is that much of it is simply dead fish or shellfish that have been washed down by recent rain or caught in a tidbit of food that was too big for them to handle. If you have a fish tank then periodically cleaning it and discarding any dead fish that might have accumulated in it is necessary. However, if your tank is fairly new and clean, then you may not need to do anything more than clean it every few months as the water will stay healthy and bright. As a general rule of thumb, any dead shellfish or fish in your pool should be removed as soon as possible to avoid spreading diseases to other fish in the tank or water.


Alcohol, fertilizers, chemicals, and water treatment systems are all elements that you should consider adding to your pool for the right ph balance. Chlorine and sulfur are two chemicals that you can use to cleanse your pool of various germs. Rainwater and old water are the two main sources of germs in your pool. The best way to maintain healthy and safe pool water is by regularly testing it and adjusting the levels of everything that you’ve added to it. By doing this, you’re sure to maintain that crystal clear pool that you and your family enjoy so much. Just make sure that you don’t add too much of anything to your pool water as this will only cause problems down the line.

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