Aquaristics with live plants is not just a hobby, it’s a balance of a complex ecosystem where every element plays a critically important role. To achieve lush, healthy, and intensely green underwater landscapes (aquascaping), plants need to be provided with three key components: light, macro- and microelements, and, most importantly, carbon. Carbon (C) is the building material for all organic compounds, and its primary source in an aquarium is carbon dioxide (CO2).