Royal Pool & Spa pH Minus - 1,5 kg
Powder product for lowering and stabilising the pH of water in pools and hot tubs. Active ingredient: sodium hydrogen sulphate (96%).
Correct pH is the foundation of clean water
Fast-dissolving granules for gradually lowering and stabilising water pH. Helps set the ideal range in which disinfection works more effectively and the water is gentler on skin and eyes.
Why is correct pH so important?
Excessively high pH reduces disinfection effectiveness, promotes cloudiness and increases the risk of limescale and mineral deposits.
More effective disinfection
Both chlorine-free and chlorine disinfection work more consistently and effectively within the correct pH range.
Less cloudiness
Balanced pH reduces dull water, milky cloudiness and calcium deposits.
More comfortable bathing
Correct pH helps reduce irritation of skin, eyes and mucous membranes.
Ochrana technologie
Helps protect pipework, jets, filtration, heating elements and heat exchangers from deposits.
Lower pH gradually
To lower pH by 0,1 use 10 g of product per 1 m³ of water. Lower pH by no more than 0.2–0.3 in one step.
Basic dose for precise, gradual pH correction in pool or hot-tub water.
Safe gradual correction followed by a control measurement.
Corresponds to the maximum recommended pH reduction of 0.3.
How much product will you need?
| Water volume | pH reduction by 0.1 | pH reduction by 0.3 | Typical use |
|---|---|---|---|
| 0,5 m³ | 5 g | 15 g | Small hot tub or bathing barrel |
| 1 m³ | 10 g | 30 g | Typical hot tub |
| 1,5 m³ | 15 g | 45 g | Larger hot tub |
| 5 m³ | 50 g | 150 g | Smaller pool |
| 10 m³ | 100 g | 300 g | Family pool |
| 20 m³ | 200 g | 600 g | Larger pool |
| 30 m³ | 300 g | 900 g | In-ground pool |
| 50 m³ | 500 g | 1 500 g | Large pool |
Correct application step by step
Never add the granules directly to the pool or hot tub. Always dissolve them in lukewarm water first.
Measure the pH
Determine the current value using test strips. The target range is 6.8–7.2.
Check the alkalinity
Before adjusting pH, stabilise water alkalinity at 80–120 ppm.
Calculate the dose
To lower pH by 0.1, measure 10 g per 1 m³ of water.
Dissolve the granules
Dissolve the measured amount in a plastic container of lukewarm water and mix thoroughly.
Apply with circulation running
Distribute the solution evenly along the edge or pour it into the skimmer with circulation running.
Measure pH again
Run circulation for 15–30 minutes. Then measure pH again and repeat the process according to the result.
What does the measured pH mean?
| pH value | Water condition | Possible risk | Recommended action |
|---|---|---|---|
| Below 6.5 | Water too acidic | Aggressive water and possible equipment damage | Use pH Plus |
| 6,8–7,2 | Ideal range | Disinfection and chemicals work optimally | Maintain through regular testing |
| Above 7.6 | High pH | Cloudiness, limescale and reduced disinfection effectiveness | Use pH Minus |
| Above 8.0 | Significantly high pH | Heavy deposit formation and reduced chemical effectiveness | Lower gradually by 0.2–0.3 |
For pools, hot tubs and wellness facilities
Suitable uses
- Family and public pools
- Inflatable and acrylic hot tubs
- Bathing barrels and Nordic tubs
- Swim spas and plunge pools
- Hotel pools and wellness facilities
- Fresh and salt water
Kompatibilita
- Chlorine disinfection systems
- Chlorine-free QAC systems
- Active oxygen systems
- Sand and cartridge filtration
- Acrylic, PVC, vinyl and stainless steel
- Manual and automatic dosing
Product specifications
| Product name | ROYAL POOL & SPA pH MINUS |
| Category | pH adjustment / lowering water pH |
| Variant | 1,5 kg |
| Packaging | Resealable pouch / doypack with measuring scoop |
| Product code | RP7015 |
| EAN | 8594233820112 |
| Active ingredient | Sodium bisulphate |
| Target pH | 6,8–7,2 |
| Optimum alkalinity | 80–120 ppm |
| Dosing | 10 g per 1 m³ to lower pH by 0.1 |
| Shelf life | 24 months from the date of manufacture |
| Storage temperature | +5 to +30 °C |
| Country of manufacture | Czech Republic |
| Manufacturer | Royal Pure s.r.o., Výpravní 751/20, 619 00 Brno |
DANGER
- H314: Causes severe skin burns and eye damage.
- Wear protective gloves and safety glasses.
- If in eyes, rinse cautiously with water for several minutes and call a doctor immediately.
- Never add the granules directly to the pool or hot tub. Always dissolve them in lukewarm water first.
- Do not lower pH with a large dose at once. Always take a control measurement between steps.
- If pH falls below 6.0, immediately dilute with fresh water and then use pH Plus.
- Keep out of reach of children. Protect from moisture, frost and direct sunlight.
- UFI: 5H00-U0NS-000X-S3EX
| Category: | pH adjustment |
|---|---|
| EAN: | 8594233820112 |
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| Manufacturing company : | Royal Pure s.r.o. |
|---|---|
| Address : | Výpravní 751/20, 619 00 Brno, Česká republika |
| E-mail : | info@royal-pure.cz |
