Muriatic acid and hydrochloric acid are the same product and both contain the chemical compound HCI, which is composed of hydrogen and chlorine.
Hydrochloric acid is the scientific name, often referred to as muriatic acid when it is used in industrial or home applications such as cleaning, or adjusting pH and alkalinity in swimming pools.
Depending on which country you live in, the product for pools will be labelled either muriatic acid or hydrochloric acid.
In pool maintenance, muriatic & hydrochloric acid are used for pH adjustment, alkalinity reduction and surface cleaning.
pH Adjustment
Muriatic or hydrochloric acid is used to lower pH levels in pools. High pH levels can reduce the effectiveness of chlorine, leading to cloudy water. High pH can also cause scaling, which appear as white crusty deposits on the pool’s walls and floor.
By adding muriatic or hydrochloric acid to the pool the acidity of the water increases, which lowers the pH levels.
In swimming pools, the recommended range for pH is between 7.2 to 7.8. Ideal pH for concrete or vinyl liner pools is 7.4 and for fibreglass pools 7.2 is optimal.
Alkalinity Reduction
If alkalinity in your pool is too high, it can contribute to pH fluctuation, making it difficult to maintain proper water balance.
High alkalinity levels can also lead to scaling, making the water appear cloudy.
Adding muriatic or hydrochloric acid will lower alkalinity and improve overall water quality.
Alkalinity target levels are 80-120 ppm.
Surface Cleaning
Muriatic or hydrochloric acid is effective for cleaning pool surfaces, particularly for removing mineral deposits, calcium scale and other stubborn stains.
It can be used to clean pool walls, floors, tiles and other surfaces that over time may accumulate mineral build-up.
While muriatic or hydrochloric acid are commonly used in pool maintenance, there are alternative options available for pH and alkalinity adjustment or surface cleaning.
Sodium Biosulphate
Sodium bisulphate is another pH and alkalinity adjuster, also known as dry acid, pH down, pH decreaser or pH minus.
Sodium bisulphate is sometimes preferred to be used by pool owners, because it is considered less corrosive and safer to handle.
It’s easier to store, measure and apply than muriatic or hydrochloric acid, but can be more expensive.
Using dry acid continuously can contribute to increased calcium levels and scaling over time.
It is important to regularly test calcium levels, pH and alkanity to have the water balanced to help prevent conditions that may lead to calcium build-up.
Pool Surface Cleaners
There are specialised pool surface cleaners available that are made to remove mineral deposits, calcium scale and stains without the need for muriatic or hydrochloric acid.
These cleaners are usually milder and safer to use than acid-based products and are less likely to cause skin irritation or respiratory discomfort when applying.
Careful handling of muriatic or hydrochloric acid is required because of their hazardous nature.
Protective Gear
Wear gloves, safety goggles and protective clothing when handling muriatic acid or hydrochloric acid.
Avoid direct contact with skin, eyes and clothing to prevent burns and irritation.
Ventilation
Use muriatic acid or hydrochloric acid in a well-ventilated area to prevent the build-up of harmful fumes.
Avoid breathing in vapours or fumes by working outdoors and using a respirator mask if indoors.
Dilution
When adding muriatic acid or hydrochloric acid, dilute with water to decrease the potency. Always add water to acid, not acid to water and stir gently to mix thoroughly.
Dosage
Use test-strips, a pool water testing kit, or have your pool water professionally tested to determine the current pH and alkalinity levels.
Follow the manufacturer recommendations for dosage to adjust the water, carefully adding the required amount of acid into the pool.
Proportionally add more acid in the deeper end than the shallow end.
Storage
Properly seal containers to prevent accidental spills or leaks.
Store in a dry, cool and well-ventilated area, out of direct sunlight and away from other heat sources.
Keep acid at least one metre from any pool equipment.
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Simplify your pool maintenance routine with POOLWATER-PRO.
Our software turns test-strips into accurate digital readings, right from your phone.
Get instant alerts to know if your pool is safe to swim, plus any chemicals needed.
By embracing effective pool maintenance practices and utilising POOLWATER-PRO.COM, you can overcome chemical balancing challenges and easily maintain a clear and inviting pool.
Spend less time worrying and more time splashing with your own pool expert on hand.
Visit POOLWATER-PRO.COM to learn more and embark on your journey to pool clarity today.
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