Red Sea Coral Colours B is a Potassium complex that promotes the Red Colours in Corals Contain 18 trace elements that are depleted constantly from the water and found in coral soft tissue and skeleton Red Sea research has shown a direct relationship between Calcium uptake and the 31 individual elements of the Reef Colour supplements. Coral Colours B supplement is part of the complete range of complementary major, minor & trace element complexes which together provide the needs of corals. Coral colours B supplement contains Potassium and other cations that are associated with many biological processes, one of them being the production of red pigments in the soft tissue of corals. To ensure coral health, the ppm level of these elements must be maintained within a narrow band and therefore should only be dosed according to a measured requirement of the aquarium. For optimal results, dose accordingly to a measured uptake of Potassium using Red Sea\'s Potassium Pro test kit. An easier alternative is to dose in proportion to the dosing of Red Sea\'s Foundation A (Calcium/Strontium) supplement. For best results in displaying coral colours use Red Sea\'s NPX Can also be used as part of the Stage 4 - Reef Colours in the Red Sea Reef Care Program. The Reef Colours Stage 4 provides a complete solution for testing and dosing all Reef Colour Supplements based on a measured calcium uptake. Use with Reef Colours A, B, C, D and Reef Colours Pro Test Kit for accurate testing and dosing This products is part of the new Red Sea unique Reef Care Program (RCP). The Red Sea reef care program is the result of over 5 years research from Red Sea scientists resulting in unparralleled understanding of the requirements of coral aquariums. The Red Sea Reef Care Program provides a holistic solution to maintaining a flourishing coral reef aquarium. It even allows beginners to achieve stunning sps aquariums safely.