Seachem Reef Buffer 250g – Reef pH & Alkalinity Stabiliser

Seachem Reef Buffer 250g is a reef-specific buffering supplement formulated to safely raise and stabilize aquarium pH at the ideal reef level of 8.3. Unlike standard marine buffers that rely solely on sodium bicarbonate, Reef Buffer uses a balanced blend of carbonate and bicarbonate salts, delivering superior buffering performance without the risk of dangerous pH spikes.

With an effective pK of approximately 8.6 in saltwater, Reef Buffer is engineered to counteract the strong pH-lowering effects of organic acids produced in coral-dense reef systems. This higher buffering capacity ensures greater pH stability and consistency compared to generic marine buffers, which often fail to reach proper reef pH levels. When used as directed, Reef Buffer also supports controlled alkalinity increases essential for coral health and growth.

Key Features:

• Safely raises reef aquarium pH to 8.3
• Reef-specific carbonate & bicarbonate blend
• Higher buffering strength with pK ~8.6
• Prevents accidental pH overshooting
• Raises alkalinity in a controlled manner
• Ideal for coral-heavy reef systems
• Designed for regular pH maintenance
• More effective than standard marine buffers

Seachem Reef Buffer 250g provides precise and reliable pH stabilization for reef aquariums where standard buffers fall short. Its advanced formulation ensures stable pH and alkalinity levels, supporting coral vitality, consistent growth, and long-term reef system balance.