pH Reducer (Minus)


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pH Reducer (Minus)

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Details

pH Minus for hot tubs is a chemical treatment designed to lower the pH levels in your hot tub water when they become too high. Proper pH balance is crucial for maintaining safe, clear, and comfortable water. When the pH is too high, it can cause several issues, including scale buildup, cloudy water, and discomfort for bathers. pH Minus helps you bring the pH levels back into the optimal range, ensuring that your hot tub remains in the best condition.

Product Benefits:

  • Prevents Scale Buildup: High pH levels can cause mineral deposits and scaling on the hot tub’s surfaces, filters, and equipment, leading to clogged pipes and decreased water flow. pH Minus helps maintain clear, clean water by preventing scale formation.

  • Protects Hot Tub Equipment: Excessively high pH can damage hot tub heaters, jets, and plumbing, as alkaline water is more corrosive. Using a pH reducer ensures your equipment stays in good condition and functions optimally.

  • Improves Bather Comfort: Water that is too alkaline can cause irritation to the skin and eyes. Maintaining the correct pH range ensures a comfortable soaking experience without skin irritation or burning eyes.

  • Optimizes Sanitiser Efficiency: Proper pH levels are critical for the effectiveness of chlorine or bromine sanitisers. When pH is too high, these sanitizers become less effective, potentially leading to unsanitary conditions in your hot tub. Lowering the pH with pH Minus helps maintain water sanitation and safety.

Treatment:

  1. Test the Water: Use a reliable test kit or test strips to measure the pH level in your hot tub. The ideal pH level for spas is between 7.2 and 7.8. If the pH is above this range, you may need to add pH Minus.

  2. Calculate the Dosage: Based on the test results and your hot tub size, determine how much pH Minus you need to add. Follow the manufacturer’s instructions for accurate dosing.

  3. Add the pH Minus: Add the required amount of pH Minus to your hot tub water. If using a granular form, sprinkle it evenly across the water’s surface. If using a liquid form, pour it slowly into the water while the jets are running to help with even distribution.

  4. Allow Circulation: Let the hot tub water circulate for several hours to ensure that the pH reducer is fully dissolved and evenly mixed.

  5. Retest the Water: After the water has circulated, retest the pH to ensure it has fallen within the desired range (7.2 to 7.8). If necessary, add more pH Minus in small increments until the desired pH level is achieved.

  6. Regular Maintenance: Regularly test your hot tub water to monitor pH levels, especially after adding other chemicals or after heavy use. Adjust the pH as needed to keep your water balanced.

Using pH Minus for your hot tub ensures your water stays in the optimal pH range, preventing scale buildup, corrosion, and irritation. Regular use of pH reducers keeps your water clear, safe, and comfortable for every soak.

Storage and Handling:

  • Store in a cool Dry Place
  • Keep out of reach of children
  • Wear protective gloves/protective clothing/eye protection/face protection

Safety & Use:

Chemical Data Sheet

FAQs

What is a pH Reducer (Minus)?

pH Reducer is a chemical product used to lower the pH level of pool or spa water when it becomes too high.

Why is lowering pH important?

High pH can cause:

  • Cloudy water

  • Scaling on pool surfaces and equipment

  • Reduced effectiveness of chlorine or sanitizers

  • Skin or eye irritation
    Maintaining balanced pH ensures comfortable, safe, and sanitized water.

What is the ideal pH range for pool or spa water?

The recommended pH range is 7.2 to 7.6 for most pools and spas.

 

How do I know if I need to use a pH Reducer?

Use a reliable test kit or test strips. If your pH is above 7.6, you should add a pH Reducer.

 

How do I apply the pH Reducer?

Always follow your product’s label, but general steps include:

  • Test your water to determine how much to add

  • Dissolve dry products in a bucket / jug

  • Add the solution to the deep end of the pool while the pump is running

  • Circulate water for at least 30–60 minutes
    Never mix chemicals directly together.

How long after adding pH Reducer can I use the hot tub?

Typically 30 minutes to 1 hour, as long as the water has fully circulated and the pH has re-tested within the safe range. Check your product’s instructions for specifics.

 

How much pH Reducer should I use?

Dosage depends on:

  • Starting pH

  • Total alkalinity

  • Water volume

Follow the dosage chart on your product’s label. When unsure, add smaller increments and retest.

Can I add too much pH Reducer?

Yes. Over-treating can cause the pH to drop too low, leading to:

  • Corrosion of metal parts

  • Damage to pool surfaces

  • Irritation to skin and eyes

If pH drops too low, you may need a pH increaser (sodium carbonate).

Is pH Reducer safe to handle?

It is safe when used properly, but it is still a chemical. Always:

  • Wear gloves and eye protection

  • Avoid breathing dust or fumes

  • Store in a cool, dry place

  • Keep away from children and pets

How often should I check pH levels?

At least 2–3 times per week for pools and before each use for spas. More frequent testing is recommended during heavy use or hot weather.

 

Does pH Reducer expire?

Dry forms store well for long periods if kept dry. Liquid acids can degrade slowly if exposed to heat or sunlight. Always check for clumping, discoloration, or weakened potency.

Need some help or advice? Call 0116 251 3378 or email us at customercare@hottubsuppliers.com

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Accreditaitons

Credit subject to status and affordability. Terms & Conditions Apply. Hot Tub Suppliers Limited, Unit 15, Genesis Business Park,Magna Road, Wigston, LE18 4AJ FRN: [654375] is a credit broker and is Authorised and Regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Financial Services Register no. 704348. The register can be accessed through http://www.fca.org.uk

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