Seachem Alkaline Buffer™ – Safely Raise pH & Stabilise KH for Freshwater Aquariums

Achieve stable, balanced water conditions with confidence. Seachem Alkaline Buffer™ gently raises pH and alkalinity (KH), helping you create a healthy, consistent environment for your fish and plants.

Key Benefits:

• Safely raises pH without harsh chemicals
• Increases and stabilises carbonate hardness (KH)
• Non-phosphate formula helps reduce algae risk
• Ideal for planted tanks and hard water conditions
• Works with Acid Buffer™ for precise pH control

Works with Acid Buffer™ for precise pH control

Low or unstable pH and KH levels can lead to stress, poor fish health, and fluctuating water conditions. Maintaining proper alkalinity helps stabilise pH — creating a more predictable and healthy environment for your aquarium.

Perfect for:

✔ Aquariums needing higher or more stable pH
✔ Hard water setups
✔ Planted aquariums avoiding phosphate-based buffers
✔ Hobbyists wanting controlled, balanced water chemistry

Alkaline Buffer™ raises pH and increases carbonate hardness (KH), helping to stabilise your aquarium’s water chemistry. When used together with Acid Buffer™, you can accurately set and maintain a pH range between 7.2 and 8.5.

If you’re looking for a safe and effective way to stabilise and raise your aquarium’s pH, Alkaline Buffer™ gives you the control you need for a healthier, more balanced tank.

Product information:

• Raises pH and alkalinity (KH)
• Non-phosphate buffering system
• Suitable for freshwater aquariums