R/O Alternative? - Kati Ani De-ionizers

[Aquattro]

You also need a fair amount of acid, and ideally, a large box of baking soda to neutralize it before you dump it. And it's a disgusting slimy mess. I'd never do it again. I used to collect those API resins and recharge them, but not worth it.

[hillegom]

Basically we are talking about the DI part of the RO/DI are we not?