DI only filter? (Already have a 5 stage RO system)

[tomtom5280]

I already have an ISpring 5 stage RO filter. Is there any filter system that is cheap and compact that can just do the final DI filtering stage, rather than installing and/or replacing my entire existing system?

 

[lapin]

Just add the d/I canister to your good water output. It’s always the last stage in a system. However if it has a re mineralization stage , I would eliminate it. There is no need to put minerals back in your tank water . Plus it will eat up your resin faster.

https://www.bulkreefsupply.com/single-deionization-canister.html