Seachem Reef Kalkwasser

Seachem Reef Kalkwasser
A high-purity calcium hydroxide powder used to prepare kalkwasser (limewater) for maintaining calcium and alkalinity in reef aquariums.

Seachem Reef Kalkwasser is a premium reef supplement designed to help maintain calcium levels at natural seawater concentrations while supporting carbonate alkalinity. Made from highly pure calcium hydroxide, it dissolves efficiently to create kalkwasser for dosing through top-off systems or manual supplementation. This method is widely used by reef aquarists to promote strong coral skeletal growth and maintain stable reef chemistry.

Many reef keepers dose kalkwasser through an Auto Top Off (ATO) system, where evaporated water is replaced with kalkwasser solution. This allows for slow, consistent dosing throughout the day, helping maintain stable calcium, alkalinity, and pH levels in reef aquariums.

Kalkwasser dosing can be an effective way to maintain calcium and alkalinity simultaneously while helping buffer pH levels. Due to its potency, it is best suited for reef keepers comfortable monitoring water chemistry and dosing carefully. Ideal for marine reef systems with stony corals, clams, and other calcium-consuming invertebrates.

Features & Benefits

• High-purity calcium hydroxide for reef aquariums

• Helps maintain natural calcium levels

• Supports carbonate alkalinity through kalkwasser dosing

• Commonly used with Auto Top Off (ATO) systems for stable dosing

• Promotes healthy coral and invertebrate growth

• Suitable for marine and reef aquariums