Calix Limited engages in minerals processing and carbon capture business in Australia and internationally. The company offers ACTI-Mag, a solution for phosphate removal, pH and boost alkalinity stabilization, biogas management, odor control, and biochemical oxygen demand/chemical oxygen demand reduction, as well as for fats, oils, and greases in wastewater. It also provides PROTECTA-Mag, a solution for sewer asset corrosion protection; and AQUA-Cal+, a solution for lake and pond water remediation and aquaculture farming. The company was founded in 2005 and is headquartered in Sydney, Australia.