All Arium Advance systems have the iJust feature integrated. iJust helps define the optimal ratio of product and wastewater for the reverse osmosis module. Usually it is a fixed ratio; however, the iJust feature can adjust the ratio depending on local hardness and CO2 level in the feed water. Better quality feed water leads to a higher ratio of product water compared to wastewater. iJust also optimizes cleaning intervals for reverse osmosis (RO) modules, based on feed water quality.