Use to maintain a high buffering capability and a stable pH    

Stimulates growth of higher algae and macro algae    

Replaces essential trace elements

Vitamin additive for fish and inverts.

Use weekly to aid growth of hard corals, Calcareous and Coralline algae  

 A one shot supplement for a healthy balanced aquarium    

Calk is dosed by monitoring the calcium and alkalinity of aquarium water

Supplies all the nutritional requirements for marine invertebrates.  

Complete kit for hobbyists wishing to successfully grow hard and soft corals