Thanks! I ask because I was watching a Beersmith podcast with Steve Piatz and he was saying to k-meta, wait a day, then k-sorbate.
i've seen both together and staggered as suggestions. i decided to go with together since i like the idea of some sort of syngergy between the two, but i suspect both work. i haven't read anything about them together being bad.
i realize this is n=1, but i'm dealing with a suspected wild yeast in my blackberry melomel. some wild bug survived months in the freezer and woke up in my mead. sacch was done but it kept on chugging. added kmeta and sorbate at the same time, within 8 hours all signs of activity ceased. so using them in combo worked for me (thise once).
And only use k-sorbate if you plan to back sweeten.
that is good general advice, but not universal. i've been able to backsweeten without sorbate by pushing the yeast beyond its alcohol tolerance, getting it to give up and hibernate, waiting a few month to ensure no more activity despite there being residual sugars, and then bottling that after backsweetening. did use anything other than kmeta on that batch.
on the flip side, i needed to use sorbate on my current infected batch regardless of my plans to backsweeten.
so i wouldn't recommend that everyone try backsweetening via my "push yeast over the limit then wait" method, nor are infections a common thing, but there are situations when "only use k-sorbate when backsweetening" might not apply...
I'm still new to mead making so I'm full of questions.
you've come to the right place. we're all here to learn