540g Mixed Bed Colour Changing DI Resin
This premium mixed bed, colour changing resin contains both cation and anion resins combined in the one bag. It is a nuclear grade deionisation resin that will physically change colour as it becomes exhausted, alerting you to when it is time to replace it, even if you don’t have a TDS monitor on your system.
DI resin is a necessary part of any RO system used to produce water for your reef aquarium. It will ensure that your system produces reef safe water with total dissolved solids (TDS) reading of zero.