Purple-Up is a new pink and purple coraline algae accelerator. Since Purple-Up is not a fertilizer it does not promote the growth of nuisance algae. Purple-up uses a unique dual method approach to coraline algae acceleration. It contains ionic calcium which immediately raises dissolved calcium levels in your aquarium water. At the same time Super Sea Calcium (a 10 micron aragonite powder derived from natural seawater) targets the live rock surface. Super Sea Calcium dissolves in situ; delivering calcium strontium magnesium and carbonate right where its needed. Purple-Up also replenishes iodine; an essential element for coraline algae tissues that quickly becomes depleted in closed systems. Purple-Up is an excellent addition to any aquarium with stony corals too! One bottle of Purple-Up replaces the typical multi product recipe for successful coraline algae growth favored by advanced aquarists.