Ensuring your pool pH level is balanced is a vital part in pool ownership. pH is what determines the water acidity. pH numbers range from 0 to 14 with the right pool water pH being between 7.2 and 7.8. If the water goes above 7.0, then it’s an indication that the water is becoming more alkaline.
What is the importance of an ideal pH level?
If the pH levels of your pool water are too high, the water becomes too alkaline and it starts to form scale on the surface of the pool and equipment. If the pH level is too low, then the pool water is acidic. This causes corrosion on the pool surfaces and the equipment in your pool thus damaging them. To maintain a well balanced pH level in the pool and avert some costly damages to the pool surfaces and equipment, you will need to use chemicals to lower pH in pool.
How to lower pH in pool
The first thing you need to do if you think that your pH levels are high is to test the swimming pool PH. After you have determined the pH level, then you can start looking for ways on how to lower pH in pool. High pH levels in pool can be reduced with an acid. Some of the most common pool acids are:
• liquid hydrochloric (muriatic acid) and
• Dry acid (sodium bisulphate).
Sometimes they may be referred to as pH minus, pH decreaser and pH reducer. It’s important to know what chemical you are purchasing because the way you mix the chemicals is critical.
How to lower pH in pool with dry acid (Sodium Bisulfate)
• Carefully read the instructions in the label since different manufactures have different percentages for sodium bisulfate. The most common percentage is 93.2%.
• How much acid do you need to add? This will depend on the results you got after testing you pool water. We recommend that you add three quarters of what is recommended and then test later until you feel comfortable. The most important thing is that you do not add too much of it.
• Sodium Bisulfate often comes in powder form so you will want to avoid working with it on a windy day. If you live in an area that’s breezy, then you have no option. But you can try and add it downwind from you since you don’t want to spill the acid on your clothes or worse the skin.
• Get close to the level of water as you possibly can because the wind will easily blow the powder into the air instead of into the pool.
• Pour the powder into your pool at the water return jet sights. This is where the water will come into the pool. Do not add the powder to the water at the inlet sights like the skimmer area. It’s important that the dry acid is evenly spread around the pool so that it reaches all the corners.
• Give it about 5 to 15 minutes as it dissolves on its own completely. You will not need to spread the powder with your hands in the water.
• Allow the chemical to mix before you retest, but do not wait for more than 24 hours after you have added your last portion of dry acid.
Note: If you are lowering pH levels of above ground pools, place the Sodium Bisulfate over the pool wall. Since above ground pools are often shallow than inground pools, you may have to use your hands to spread the powder in the pool so that it can dissolve faster.
If the manufacturer has recommended that the Sodium Bisulfate is first dissolved, follow that advice. This could be that the product may react quickly in the water reducing alkalinity levels thus affecting both the alkalinity and pH levels. Sodium Bisulfate will likely decrease your pH and alkalinity as well. You will need to test for both after you are done.
How To Lower Ph In Pool With Muriatic Acid
• Always read the manufactures’ instructions first. This is one dangerous acid that can burn your skin and ruin your pool surfaces if it’s not used properly. Ensure you also have the correct protective wear.
• Establish the needed amount of muriatic acid to add to your pool based on the pH levels you have tested. You can add three quarters of what is recommended and then test the pH later on until you get the desired results of adding the chemicals to your pool.
• The manufactures’ instructions may recommend that you dilute the muriatic acid first. Please follow these instructions.
• Although muriatic acid is liquid, you still don’t want to pour it into the pool while facing the wind. Further, avoid pouring the acid into the filter basket or skimmer.
• There are two ways of adding muriatic acid into the pool. Both of them are effective so it’s up to you to choose the one that you feel comfortable with. You can pour the muriatic acid in one continuous stream on one spot into the pool.
hile doing this turn off the pump so that the acid hits right at the bottom and lowers the pool pH without affecting the water at the top. You can turn on the pump after you have finished pouring the muriatic acid. The other way is to pour it into the water near the water return jets so that it’s evenly spread into the pool. If you do not have a deep end, then you can pour on different areas of the pool. You do not want to concentrate all the acid on one area of the pool.
When adding any type of acid into the pool, extreme care must be taken as ignorance can lead to serious burns. Before you can add the acid, ensure there is nobody swimming in the pool or will use the pool before four hours are over.
Make sure you first add acid to water, never add water to acid! If you plan to add large amounts of acid, do it slowly. Don’t add high acid amounts in the pool all at once. If you pour in too much acid into the pool at once, you may risk damaging the walls, corroding the pump fittings and pipes and lowering the total alkalinity of the water.