Calicum Reactor system vs. an "The Nautilis II"

[Wolverine57]

I'm been comtiplating on purchasing an automatic dosing pump system, like the "The Nautillis II". Then, there is the calicum reactor!

Question: What is the difference between a Calicum Reactor system vs. an "The Nautilis II" (automtic dosing pump -calcium/alkalinity control system)?

What would you recommend?
Appreciate your feedback, thanks!

 

[Deanos]

Here's a few threads found using MR's SEARCH feature:

CA Reactor, B-Ionic, Randy's 2 part ?

Randy's two part or B-Ionic

Kalk Reactor vs Calcium Reactor ***