Purple Up - uses a unique dual method approach to coralline algae acceleration. This approach is so unique that Purple Up has been awarded a US patent. 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. This dissolves in situ; delivering calcium, strontium, magnesium, and carbonate right where it’s needed. Purple Up also replenishes iodine; an essential element for coralline algae tissues that quickly becomes depleted in closed systems. Purple Up is not a fertilizer, it does not promote the growth of nuisance algae. CaribSea Purple Up is used to grow coralline algae in marine aquariums and to boost calcium levels in reef aquariums. Accelerates desirable pink and purple coralline algae growth.

Brings out the vibrant colors in your live rock!

Wont encourage growth of nuisance algae.

Unique, single-bottle formulation immediately raises dissolved calcium levels and targets live rock surfaces. Replenishes iodine levels and won't encourage nuisance algae growth.

One bottle of Purple Up replaces multi-product recipes for coraline algae!