Seachem Reef Kalkwasser 500g – Pure Calcium Hydroxide for Reef Aquariums

Seachem Reef Kalkwasser™ is a high-purity calcium hydroxide designed to maintain natural seawater calcium levels in reef aquariums. When mixed with freshwater, it creates limewater (kalkwasser) that supplies calcium directly while supporting carbonate alkalinity indirectly through natural CO₂ interaction.

This proven supplementation method is ideal for reef systems with sufficient evaporation rates and helps promote strong coral skeletal growth, stable pH, and long-term reef health. Reef Kalkwasser™ offers exceptional solubility and purity, making it a trusted choice for experienced reef keepers seeking precise calcium control.

For systems with higher calcium or alkalinity demand, kalkwasser can be safely supplemented alongside dedicated calcium or alkalinity additives (added separately).

Key Features:

• High-purity calcium hydroxide formula
• Maintains natural seawater calcium levels
• Supports carbonate alkalinity indirectly
• Promotes coral growth and skeletal strength
• Excellent solubility and consistency
• Economical and long-lasting supplementation
• Ideal for reef tanks with adequate evaporation

Seachem Reef Kalkwasser 500g is a professional-grade calcium supplement for reef aquariums, delivering reliable calcium maintenance and pH stability through limewater dosing. Perfect for advanced reef keepers who want precision, purity, and proven results. Available now at Reef Freaks.