Which BRS Kalk Package Should I Get?

[PugsAndFish]

I've been using Seachem Kalk for now but want to use the BRS one and use the BRS 1.1 doser with it just because I like BRS.

Which kalk package should I get? I was going to get just the Kalkwasser here but I see additional packages for starters here. What's the purpose of the additional additives in the starter package? The additives just seem like ways to dose alk, ca, mg separately just like 2 part so I'm a bit confused.

 

[Fishfinder]

It just comes with cal, alk, and mag mix to balance out your levels when you start

 

[Fishfinder]

If everything is good I would just get the kalk