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Last Updated - 14.12.2025

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01

PROFI Clean

PROFI-Clean pH Minus Liquid pH Countersink 25 kg / 20 Litre Canister | Lowering the pH Value Pool, Whirlpool, Paddling Pool & Swimming Pool

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9.8

Exceptional

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Versatile applications: Our pH liquid is not only suitable for pools, but also for hot tubs and other water systems. The perfect solution for all water lovers
Suitable for: pools, public swimming pools, hot tubs, bath ponds & more
Precise pH control: our liquid pH minus is the key to precise regulation of the pH value. Keep the water in your pool or water system in perfect balance.
OPTIMAL WATER QUALITY: Proper pH is critical to maximizing disinfectant effectiveness. With our pH you ensure flawless water quality.
Easy to use: application couldn't be easier. Simply add the recommended amount of granules to the water and enjoy control of the pH without stress.

44,80 €
02

Nortembio

Nortembio Pool pH Minus 5 L and 10 L

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9.7

Exceptional

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Product that has been specially developed for dosage in swimming pool water using automatic pH regulation and control.
Our pH reducer is made from organic citric acids which are very beneficial to our health. Acts as a natural antioxidant that respects our skin and also enhances the disinfecting effect.
Not suitable for basins with salt chlorination (salt electrolysis).
It naturally regulates and adjusts the pH of swimming pool water and restores the transparency of swimming pool water while respecting your health and skin.
Essential for optimal water treatment and to prevent pH imbalance problems such as skin and eye pain during bathing. We do not use harsh chemicals.

27,95 €
03

Bayrol

BAYROL e-pH Minus Granules 6 kg - Quickly and Effectively Lowers Too High pH Value in the Pool - Easy Dosage Directly into the Water - Contains Dosing Cup - pH Reducer - pH Regulation Pool

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15% Off
9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Safe: Bayrol pH Minus is compatible with all disinfection methods, filter types and pool surfaces. The bucket contains a dosing cup and bag with safety lock
Quality "Made in Europe": the high quality level is our top priority at Bayrol. This is why the pH value reducer is produced in Europe using state-of-the-art technology
Our goal: offer you the best! Trust Bayrol - this is the safest way to swim in hygienically pure crystal clear water - for more than 65 years we have been there for you
Fast and effective: Bayrol e-pH minus quickly lowers too high a pH value above 7.4 in your pool water – the ideal pH value is between 7.0 and 7.4. Check the pH value regularly
Easy pH regulation: to reduce the pH value by 0.1, 100 g pool pH minus per 10 m³ is required. The dosage takes place directly into the pool water when the circulation pump is running

22,01 € 25,95 €(15% Off off)
Value for Money

04

Tetra

Tetra pH/KH Minus (Water Conditioner for Controlled Reducing PH and KH Values) 250ml Bottle, Single

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20% Off
9.5

Excellent

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The hardness value is set accurately and hence the pH value is constantly regulated.
Plant growth is boosted by the release of CO2.
For tropical-like aquarium water with a pH value below 7.5 and hardness value around 4 °dH.
For treating acute ammonia poisoning.
Extremely safe to use, very easy to use.

8,99 € 11,29 €(20% Off off)
05

Bayrol

BAYROL PH-Minus 2294150 1.5 kg

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12% Off
9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Quality "Made in Europe": the high quality level is the first priority at Bayrol. Bayrol care products are produced in Europe using state-of-the-art technology.
Our goal: offer you the best! Trust Bayrol - this is the safest way to swim in hygienically pure and crystal clear water. We have been here for you for more than 65 years.
Optimal care: the pH value is the basis of water treatment. To ensure that all care products work optimally, the pH value should be between 7.0 and 7.6.
Fast and effective: pH minus quickly lowers too high a pH value above 7.4. Check pH at least once a week with SpaTime test strips.
Easy dosage: to reduce the pH value by 0.1, 10 g per m³ is required. Dose the granules directly into the whirlpool water with the pump running.

10,42 € 11,95 €(12% Off off)
06

Cristal

Cristal pH Minus Granules 1.5 kg – Effective pH Reduction for Hot Tubs & Spas – Easy Dosage – Highly Effective & Quick Dissolving

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9.3

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Suitable for all pool and filter systems: our pH countersink is compatible with all pool types and filter systems. Whether in the above-ground pool, recessed pool or whirlpool - the pH reducer ensures clear and balanced water quality.
Prevents limescale deposits and protects pool technology: our pH countersink ensures an optimal pH between 7.0 and 7.4 to prevent limescale deposits and protect your pool technology. This keeps your pool in top condition.
Gentle and safe to use: the pH minus granules are gentle on the materials of your pool and leave no residue. Thanks to the easy solubility, it spreads evenly and ensures a quick effect.
FOR OPTIMAL WATER QUALITY: Check the pH value 1-2 times weekly with a water tester to ensure the pH remains within the ideal range. Use the pH countersink if necessary to reliably reduce the value.
Effective pH reduction: Cristal pH reducer (pH minus) lowers the pH value of your pool water reliably and quickly. A balanced pH value is the basis for optimal water care and prevents limescale deposits as well as skin and eye irritation.
Easy dosage and use: to reduce the pH value by 0.1, you need approx. 100 g pH reducer per 10,000 litres of water. Ideal for any pool size, dissolves quickly and is easy to use.

11,95 €
07

STEINBACH

Steinbach Liquid Chlorine for Pools, pH Minus

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14% Off
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Reliably lowers the pH value in pool water - The pH minus granules are used to adjust the pH value to the optimal range of 7.0 to 7.4. This improves the effect and efficiency of all water care products used.
Important prerequisite for stable water quality - A correctly adjusted pH value not only protects the skin, but also prevents corrosion on technology and installation parts - and ensures a more pleasant bathing experience.
Ideal for all private pools – whether above ground or recessed pool – the pH minus granules are the perfect addition to regular water care and support the full effectiveness of chlorine & Co.
Easy dosage and precise effect - To reduce the pH value by approx. 0.1, it is recommended to add 100 g (approx. 75 ml) per 10 m³. The application is ideally done via pre-dissolved granules near the inlet nozzles.
Dust-reduced & highly soluble - The special granulation ensures low-dust application and dissolves quickly in the water. This simplifies handling and ensures even distribution in the pool.

22,98 € 26,90 €(14% Off off)
08

JBL

JBL pH Minus 250ml Water Processor

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31% Off
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Use at pH value >8: 10 ml/40 l water, at pH value 7-8: 10 ml/80 l water, at pH value <7: no addition of JBl pH minus
The optimal pH value for keeping most freshwater fish and plants is in the neutral range of seven. Tip: Before use, check carbonate hardness and set to 4-8°
For fish and plant-friendly aquarium water for freshwater aquariums, turtles and shrimp
Fast reduction of acidity thanks to natural oak extract. Phosphate-free
Box contents: 1 x bottle of JBl water conditioner 23047 for aquariums, 250 ml. Application: 10 ml/40 l water example 60 l aquarium: 15 ml

8,54 € 12,50 €(31% Off off)
09

BioBizz

BioBizz Bio pH Minus 0.5 L - Organic pH Countersink (Citric Acid)

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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BioBizz Bio pH Minus 0.5 L - Organic pH Countersink (Citric Acid)

11,26 €
10

POWERHAUS24

mediPool pH Minus Liquid 2 x 1 L

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10% Off
8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Special product for pools and hot tubs
Quick and convenient dosage
Liquid agent for lowering the pH value
Easy to use
Contents: 2 x 1 litre

10,86 € 12,20 €(10% Off off)