Re-visit your swimming pool in 24 hours to see if the water level is lower in the pool. You can either use your filter pump or a submersible pump to lower your pool water level. Then, check the water’s salt level readout. Test the pool’s salt levels after 24 hours. Chemical additives and contaminants can easily cause pool water to become too basic, meaning the pH is too high. Although each product is different and comes with its own instructions for use, you generally need to add an ounce or two per 10,000 gallons to lower the bromine level by 1 ppm. In today's post, you're going to learn all about water alkalinity, what causes your pool alkalinity to get too high, and how to lower it. If you do, the hydrostatic pressure can cause your pool to come out of the ground. Step 4 suggests water levels according to different types of pool covers. Is your pool water pH high and you need to lower it? Check the chlorine levels twice a day using a pool test kit to see when it is at the right level. Half of the pool skimmer opening should be above the water line to allow water to circulate properly so that debris can be drawn in. ••• 4. You should also keep in mind that routine maintenance activities like vacuuming and backwashing your pool can also lower your water levels, so be sure to add water as needed. The Dangers of a Low Water Level. In this article, I will give you all the information you need to lower pH if it is high, and explain why lowering swimming pool pH is important for the overall health of your pool and your swimmers. In this article, I explain how to lower the chlorine level in your swimming pool water. Saltwater pools need a lot of sodium to operate properly, but excessively salty water can lead to corrosive and harmful side-effects. The pH level in water can affect the acidity of soil and thereby the health and appearance of plants, though keeping tap water at the correct pH level is most important for your own health. When there is less sunlight, heat or bather load, then your pool needs less free chlorine in water as the demand for chlorine is less. If you would like to learn more about chlorine in your swimming pool, read Maintaining Swimming Pool Chlorine.. Lowering the water level in your pool is a fairly simple process. I did not lower it one year and water froze in the skimmer. You may find that heavy rain has raised the water level of your in-ground pool and needs some removed to avoid subsequent damage and overflow to surrounding foliage, or even the deck.