sera pH/KH-minus is used to adjust the carbonate hardness (KH) in your aquarium. The recommended dosage is 5ml for every 20 liters of water daily, aiming to reduce KH by approximately 1°dKH. KH can also be adjusted to 4°dKH by adding sera super peat moss to the filter, which helps maintain soft water.

• Recommended dose: 5ml per 20 liters of water daily.
• Maximum dose: Do not add more than double the daily dose.
• KH monitoring: Use sera kH-Test to check KH levels.
• Aeration: Ensure proper oxygenation of the water during application.

It is important to prevent KH from falling below 3°dKH to avoid sudden pH fluctuations.