Red Sea Coralline Gro contains the specific elements required for the active development of coralline algae in all marine systems.Coralline Gro should be used while cycling all new systems and continuously in fish only aquariums.In non-coral invertebrate or soft coral aquariums Coralline Gro should be dosed according to alkalinity levels and in conjunction with Red Sea Reef Colour A supplement.Coralline Gro should not be used when using all four Reef Colour supplements as these already provide all the needs of the coralline algae and may cause overdosing of specific elements.Dose 1ml per 100 liters to adjust to 0.1dKH (0.03 meq/l)