Replaces essential trace elements

Vitamin additive for fish and inverts.

Has a special crystal structure that makes it the fastest dissolving salt available.

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    

Use with Calk Kit Complete and balanced coral growth.