Water conditioner sera pH/KH-minus, 500 ml for aquariums up to 2000 L

sera pH/KH-minus, 500 ml, is a liquid water conditioner formulated to lower pH and carbonate hardness (KH) in freshwater aquariums up to 2000 L. It enables controlled adjustment of water chemistry to achieve softer and slightly acidic conditions required by sensitive species such as discus and angelfish, and to correct pH rises caused by biological processes. The product acts quickly to reduce and stabilise both pH and KH, helping to create a consistent environment for fish and aquatic plants.

Advantages

sera pH/KH-minus provides precise and immediate reduction of pH and carbonate hardness, allowing targeted correction during water preparation and routine maintenance. The formula is designed for predictable dosing so that aquarium managers can adjust water parameters without introducing mechanical disturbances. By controlling KH and pH, the product supports conditions that favour vitality and natural behaviour in species adapted to soft, slightly acidic water.

Suitable for

• Aquariums up to 2000 litres where KH or pH is too high
• Keeping soft-water species such as discus, angelfish and other tropical softwater fish
• Adjusting water parameters before introducing sensitive fish or for breeding setups
• Periodic correction after water changes or metabolic pH shifts

Key specifications

• Volume: 500 ml liquid conditioner
• Effective for aquarium volumes up to 2000 L when dosed according to instructions
• Function: reduces pH value and lowers carbonate hardness (KH)
• Suitable for freshwater aquaria and planted tanks

How to use

Measure aquarium KH and pH before treatment. Dose sera pH/KH-minus according to the product instructions, adding the specified amount to aquarium water or to new water during preparation. Apply gradually and retest water parameters between doses to avoid overcorrection. When adjusting KH for softwater species, target moderate values (for example around 4°dKH as a guideline) and if long-term soft conditions are required, consider using peat-based filtration media after adjustment to maintain stability.

Usage recommendations

Perform changes stepwise and monitor pH and KH regularly. For breeding or long-term keeping of soft-water species, combine controlled KH reduction with appropriate filtration media and regular water testing to ensure stable, species-appropriate water chemistry.