Water deionizer resin is used in a wide variety of industries, each having specific performance requirements. Not all ions in normal water supplies will cause spotting (especially on the anion side of the equation). Spotting will occur if cations are not removed. So your IX resin will need a sufficient ratio of cation resin. Combined with a serviceable carbon pre-filter we can maximize the number of spot-free liters of water produced.
Lanlang produces many different types of Water deionizer resin with variable ratios of cation to the anion, different exchange capacities, and conversion ratios.
Use a TDS meter to keep an eye on the outlet TDS every now and then. You’ll know your resin has expired when you’re no longer getting a spot-free finish on the glass. In terms of TDS, you’ll notice spotting above 10ppm and should change it then.