The Red Sea Trace Colors D is a specialized trace element complex designed to enhance and maintain vibrant purple and blue hues in coral species within saltwater reef aquariums. Through extensive research, Red Sea has identified over thirty essential trace elements that contribute significantly to the coloration of corals, particularly SPS (Small Polyp Stony) varieties. This supplement focuses on a unique blend of these elements known for their ability to promote striking purple and blue shades in marine life, ensuring your aquarium displays optimal beauty.