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Ambassador pH Minus (Dry Acid)

SKU
CHEM-PHMINUS

Ambassador pH Minus (Dry Acid) is a fast-acting, easy to use solution for lowering pH levels in swimming pools. Ensuring swimmer comfort, protecting pool equipment, and optimising  chlorine or bromine effectiveness. 

Available in 1kg sizes as well, or you can buy the 5kg in our multipack sizes for a better discount. 

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Ambassador pH Minus (Dry Acid) is a fast-acting, easy to use solution for lowering pH levels in swimming pools. Ensuring swimmer comfort, protecting pool equipment, and optimising  chlorine or bromine effectiveness. 

Available in 1kg sizes as well, or you can buy the 5kg in our multipack sizes for a better discount. 

Product Name RRP Discount Price QtyStock
7kg pH Minus (Dry Acid)
SKU: PHMIN7AP-1
£32.52 60% £12.90

In Stock

2 x 7kg pH Minus (Dry Acid)
SKU: PHMIN7AP_2
£65.04 62% £24.90

In Stock

4 x 7kg pH Minus (Dry Acid)
SKU: PHMIN7AP-4
£130.08 62% £48.90

In Stock

25kg pH Minus (Dry Acid)
SKU: PHMIN25OL
£77.52 45% £43.00

In Stock

Lead TimeLead Time: Next Working Day

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Ambassador pH Minus (Dry Acid)

Ambassador pH Minus (Dry Acid) is a key chemical used to reduce the pH level of your swimming pool water, ensuring a safe and comfortable swimming environment.

Also known as pH Reducer or Sodium Bisulfate, this dry acid is easy to use and an effective alternative to liquid acids. 

 


 

Why pH is important in Swimming Pools 

Maintaining the correct pH level in your pool is essential for several reasons: 

  • Swimmer Comfort: A balanced pH prevents eye, nose and skin irritaion
  • Chlorine Effectiveness: Chlorine works best within a pH range of 7.2 - 7.8 with 7.4 being ideal. 
  • Protects Pool Equipment: High pH can cause scale buildup, while low pH can lead to corrosion of metal parts, ladders and pumps. 

 


 

How to Use Ambassador pH Minus (Dry Acid)

  • Add 50g per 4,545 litres (1000 gallons) of water. 
  • Always pre-dissolve the dry acid in a bucket of water before adding in to the pool.
  • Distribute evently around the pool with the filtration system running. 
  • Wait 4-6 hours before retesting and adjusting if necessary. 

Please read instructions on the products before use.

 


 

What Can Affect pH in my Swimming Pool? 

Understanding what influences your pool's pH helps with better maintenance: 

  • Heavy Rainfall: Can lower pH levels. 
  • Swimmer Load: The more people in the pool, the hight the pH may rise. 
  • Chemical Additions: Chlorine, shock treatments, and stabilisers can alter the pH balance. 
  • Temperature Fluctuations: Warmer water thends to increase pH levels. 

 


 

How to Test and Adjust pH 

Regular testing ensures your pool water remains balanced: 

  • Use test strips, photometers or digital meters to check pH levels. 
  • If pH is too high, use Ambassador pH Minus (Dry Acid)
  • If pH is too low, use Ambassador pH Plus (Alkali/Soda Ash)  

 


What Happens If pH is Too High or Too Low? 

  • High pH (>7.8): Cloudy water, ineffective chlorine, scale buildup. 
  • Low pH (<7.2): Corrosion, equipment damage, swimmer discomfort. 

 


Understanding Alkalinity and Its Role in pH Balance

  • Alkalinity stabilises pH levels, preventing sudden changes. 
  • If alkalinity is too high, lowering pH becomes difficult. 
  • If alkalinity is too low, pH level can fluctuate drastically. 

 


Need More Help? 

For detailed guidance on pool chemistry and water treatment, we recommend reading the below 1st Direct Pools helpful guides: 

For more Product Specific Information Click Here

For further guidance, explore our resource section for downloadable documents or simply contact our technical team for expert advice.

 


Why Shop With 1st Direct Pools? 

At 1st Direct Pools, we go the extra mile to provide you with expert technical service and support. We're not just another online store, we are professionals who genuinely care about helping you maintain the best swimming pool or spa experience. Heres a few reasons on why to use us: 

  • Expert Technical Service: Our team is here to assist you, even if you don't have a product code. We offer real support from knowledgeable, experienced people, no automated responses. 
  • Free Next Day Delivery Over £60: Get your pool and spa supplies fast! We provide next-day delivery on orders placed before 12pm. 
  • Price Match Promise: Found it cheaper elsewhere? Fill out our price match form, and we will do out best to beat or match the price. 
  • Access to Trade Professionals: Need help with pool maintenance or installations? We work with thousands of trsuted trade professionals across the country. Whether you need a new liner, cover, or professional servicing, we can connect you with the right experts. 

When you shop 1st Direct Pool, you're not just buying products - you're gaining access to a reliable support network that makes pool care simple and hassle free. 

 

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