Deltec KM800 Kalkwasser Stirrer – High-Capacity Calcium Reactor

The Deltec KM800 Kalkwasser Stirrer is a high-performance kalkwasser reactor designed for large reef aquariums and commercial systems. Kalkwasser (limewater) is produced by dissolving calcium hydroxide in water, creating a highly alkaline solution rich in calcium and carbonate ions—essential for coral growth and stable reef chemistry.

Because kalkwasser reacts quickly with CO₂ in the air, it must be prepared in a sealed environment. The KM800 provides this controlled mixing chamber, producing fresh, saturated kalkwasser efficiently and safely. With the ability to hold up to 2kg of calcium hydroxide and produce up to 30 litres per hour, it is ideal for demanding systems with high calcium consumption.

Key Features:

• High-capacity kalkwasser stirrer for large systems
• Produces up to 30 litres (7.5 US gallons) per hour
• Holds up to 2kg of calcium hydroxide
• Airtight design prevents CO₂ contamination
• Suitable for commercial and very large home aquariums
• Designed for use with auto top-up systems
• Gravity-fed return to sump or aquarium
• Can be installed externally beside sump or tank
• Low power consumption – 7.5V, 3 watts

The Deltec KM800 Kalkwasser Stirrer is a robust, high-output solution for maintaining calcium and alkalinity in large reef systems. Designed for reliability and efficiency, it delivers consistent kalkwasser production while protecting solution purity. A professional-grade calcium supplementation system, available now at Reef Freaks.