Elga Vision 125 Deioniser. The Vision range of wall mounted, disposable deionisers produce deionised water at the turn of a tap. The use of colour change resin, which indicates when it is exhausted, means that no electrical supply is needed to operate these deionisers. Deionised water is produced at up to 60L/hr. Colour change windows indicate two resin exhaustion levels to enable users to monitor capacity status and anticipate cartridge replacement. Replacement cartridge code 3368.