After the first application of borax is dissolved, add the rest of the acid, followed by the rest of the borax. Brush again, and then keep the pump running for 24 to 48 hours. After 48 hours, test the water's pH and add more acid if necessary to bring the pH down to the correct level.
It's advisable to add about 20 ounces of borax for every 5,000 gallons of water in your pool. This amount will help increase the pH by approximately 0.5.
If your pool has good circulation, then 30 minutes would be more than adequate to be safe. You can use The Pool Calculator to estimate. 4 boxes of 20 Mule Team Borax with your numbers should raise the pH to around 7.1 to 7.2.
chiefwej. Those that borate the pool, (including me) run at a level of about 50 ppm. That would be about 14 pounds of Twenty Mule Team Borax, given you pool volume. You would have to get much, much higher than that before getting into any toxicity problems.
Baking soda, also known as sodium bicarbonate is naturally alkaline, with a pH of 8. When you add baking soda to your pool water, you will raise both the pH and the alkalinity, improving stability and clarity.
You're broadcasting the chemical around your pool. It takes about 20 minutes after stirring to see results. Check out how much baking soda or sodium carbonate (soda ash) is required based on your pool's current readings!
When you shock a pool, you test and adjust the pH level for a reason. With that said, if you shock a pool outside of the 7.2 to 7.4 pH range, not only will you waste a significant amount of the chlorine used, you will also end up with cloudy water.
Looking to raise pH without affecting Total Alkalinity? You can sometimes raise the pH through aerating the pool water. Yep, just add air! It's the same reason hot tubs and spas often suffer from high pH issues.
To bring down pH, use a made-for-pools chemical additive called pH reducer (or pH minus). The main active ingredients in pH reducers are either muriatic acid or sodium bisulfate (also called dry acid). Reducers are readily available at pool supply stores, home improvement centers and online.
Borax: pH 10
With a 10 on the pH scale, Borax is not as corrosive as some of its cousins like bleach and ammonia. But Borax is still an alkaline substance, good at breaking down oils and organic dirt. This is one of the reasons that Borax makes such an effective laundry booster.
You can lower the pH in your pool naturally by directing the downspouts from your house into the pool. If a pool becomes too full due to backwash it dumps water. Since rain is about 5.6 pH it is going to bring down the pH of the water naturally. The problem that you will have with rainwater is its low alkalinity.
It takes nine hours to fill a 5,000-gallon pool at 540 gallons per hour.
In other words, add acid until the alkalinity reaches about 90 to 100 ppm. Then aerate until the pH rises to 7.4 to 7.6. The main rule to keep in mind is that it takes 25.6 oz. of full-strength muriatic acid (31.45 percent hydrochloric acid) to lower the total alkalinity by 10 ppm in 10,000 gallons.
Allow the chemical to dissolve
Allow the filtration system to circulate the chemical; it should dissolve completely within about 15 minutes as long as your filtration system is working well.
Here are common causes of an alkaline pool: Algae can raise the pH. Adding strong liquid chlorine, calcium or lithium hypochlorite chlorine may raise it. Suddenly heating the water, whether from a pool heater or a string of sunny days, could up the pH.
Using liquid chlorine raises the pH of the water.
Liquid chlorine does not raise pH. When added to water, liquid chlorine (which has a pH of 13) makes HOCl (hypochlorous acid – the killing form of chlorine) and NaOH (sodium hydroxide), which raises pH.
Another way to raise pH during the late night hours is to run a refugium filled with Macro Algae on a reverse light cycle. Having the plants lighted from 11 p.m. to 8 a.m. would result in the benefit of oxygen being produced by the photosynthesis of the plants. They absorb some CO2 and produce O2.
Check Total Alkalinity (TA) first, then adjust for proper pH range. Proper TA will buffer pH, that is, it will help to prevent pH fluctuations. Use fresh, high quality test strips. Excessively high bromine or chlorine levels can result in false pH and TA readings.
However, note the alkalinity in the center column. Regardless of the starting pH, the higher the alkalinity of the water source, the more acid is required to reduce pH to 5.0. For all water sources, it is the alkalinity that actually determines how much acid to use, not the pH.
Low pH is bad for swimmers, your pool and your wallet. Acidic water is corrosive. The most immediate effect is felt by swimmers as the water will sting their eyes, nasal passages and will dry out skin and hair, causing itching.
What happens if too much shock is added? You cannot overshock a swimming pool or add too much. Adding too much shock or overshocking your pool will kill off algae. The negative of adding too much shock is it will upset the chemical balance of your pool.
While this may seem merely unappealing, a 2014 study suggested that urine can actually combine with the chlorine disinfectant in swimming pool water to make potentially harmful chemicals. The researchers recommend that all swimmers avoid urinating in swimming pools to prevent these chemicals from forming.