Top 10 pH and KH adjustment for freshwater aquarium in 2026

JBL - pH-Minus - pH / KH reducer - 100ml

(1 review)

5.99 €

Water conditioner to lower the pH in freshwater aquariums.

• En promotion
• 3 en stock

Water conditioner to lower the pH in freshwater aquariums.

SEACHEM - Alkaline Buffer 1.2kg - Ph buffer for...

(1 review)

49.99 €

Alkaline Buffer™ 1.2kg is a phosphate-free buffer solution designed to raise pH and alkalinity and control acidity with Acid Buffer™. Adjusts the pH from 7.2 to 8.5 .

• En promotion
• 3 en stock

Alkaline Buffer™ 1.2kg is a phosphate-free buffer solution designed to raise pH and alkalinity and control acidity with Acid Buffer™. Adjusts the pH from 7.2 to 8.5 .

TETRA - pH/KH Minus - 250ml - pH and KH Reduction

10.99 €

TETRA - pH/KH Minus - 250ml - Safe reduction of pH and KH

TETRA pH/KH Minus 250 ml is a solution designed to easily and gently adjust water parameters in a freshwater aquarium. This treatment helps lower carbonate hardness (KH) , which also leads to a gradual decrease in pH, resulting in water better suited to certain ornamental fish species. It is particularly suitable for tanks requiring softer water, with a KH around 4 °dH and a pH below 7.5 . Its measuring cap allows for practical and precise use, whether for occasional adjustments or regular maintenance. It's a simple addition to any maintenance routine to keep the water more stable and consistent with your fish's needs.

• Gradually reduces KH to help achieve softer, better-balanced water.
• Promotes a controlled decrease in pH for conditions suitable for freshwater fish.
• Simple dosing with measuring cap for precise and regular aquarium maintenance.

• En promotion
• 4 en stock

TETRA - pH/KH Minus - 250ml - Safe reduction of pH and KH TETRA pH/KH Minus 250 ml is a solution designed to easily and gently adjust water parameters in a freshwater aquarium. This treatment helps lower carbonate hardness (KH) , which also leads to a gradual decrease in pH, resulting in water better suited to certain ornamental fish species. It is particularly suitable for tanks requiring softer water, with a KH around 4 °dH and a pH below 7.5 . Its measuring cap allows for practical and precise use, whether for occasional adjustments or regular maintenance. It's a simple addition to any maintenance routine to keep the water more stable and consistent with your fish's needs. Gradually reduces KH to help achieve softer, better-balanced water. Promotes a controlled decrease in pH for conditions suitable for freshwater fish. Simple dosing with measuring cap for precise and regular aquarium maintenance.