Tetra pH/KH Minus 250 ml

Tetra pH/KH Minus 250 ml

  • Lowers carbonate hardness
  • Reduces the pH-value
  • Creates comfortable conditions for fish and shrimps
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Tetra pH/KH Minus lowers the carbonate hardness (KH) safely and reliably. As a result, the pH value also decreases automatically. This allows for easy and safe adjustment of the water condition and the needs of special softwater fish can be taken into account. Many freshwater ornamental fish feel comfortable in water with a carbonate hardness (KH) of 4° dH and a pH value below 7,5.


  • Lowers the pH value and the carbonate hardness
  • Creates specific soft water conditions
  • For all freshwater aquaria
  • Many freshwater ornamental fish feel comfortable in water with a carbonate hardness (KH) of 4° dH and a pH value below 7,5


To lower the pH-value and the carbonate hardness, a dosage of maximum 25 ml per 100 l aquarium water is recommended. The process should be repeated every 2 to 3 days until the desired KH is reached. This treatment method will lower the carbonate hardness by approx. 2° dH each time. During the treatment it is recommended to aerate the water and any CO2 supply should be stopped. Regular control of the pH water test ensures that the carbonate hardness does not drop below 2 to 4° dH, otherwise a dangerous drop in pH can occur.
Long-term regulation of KH and pH: Dose 5 ml per 100 l aquarium water every 2 to 3 days. This lowers the KH by approx. 0,4° dH per application. This regular treatment results in a gradual and permanent lowering of the KH.



The orientation of Tetra (founded in 1951), one of the most traditional and at the same time most innovative companies in the landscape of German aquaristics, goes far beyond the production of feed for aquarium inhabitants. The perfect interplay of research and quality ensures the highest grades, even according to the IFS standards. Beside of the well known TetraMin or the popular water care products, Tetra offers complete aquarium sets and modern cabinets in 120 countries around the globe. Tetra has been shaping and influencing the modern world of aquaristics for over 70 years with its innovative strength like hardly any other company.

General information

Item no.
EAN 4004218771475
Weight 0,26 kg
Shipping weight 0,30 kg

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