Fairly certain he means per gallon (or else I've been over-feeding my yeasts to obesity)
Yes, but that's because I make mostly 1 gallon batches.
To give you some idea, there's info about staggered nutrients etc in many places.
So rather than just suggest that you read the
NewBee guide, I'll link a
nice straight forward guide produced by Hightest. I don't know if he posted here, but he's well regarded in a number of places that are to do with home brewing.
A bit of a search will tell you how much YAN is normally required, and how much is provided by 1 gramme of FermaidK, DAP, etc. Yes, it's fair to point out that those of us who like accuracy, have got hold of a set of cheap "druggie scales", that measure down to a tenth of a gramme (or smaller).
I just basically use the method/technique as above, because it hasn't caused me any problems, I was using teaspoon and part thereof measures before I got druggie scales and my mead making is too haphazard to be of any great recommendation.
You can make it as complicated as you want, or as accurate as to be accused of being anal - it that's what presses your buttons.
Some more digging around the forums will give you a more exact guide (I've read them, but I'll be buggered if I can find them at the moment), from the guidance to use GoFerm to rehydrate the yeast, to a guide for the amounts and timings of the additions.
What I do know, is that you've picked a variety of honey that is well regarded, and your choice of yeast is well known as a good yeast for traditionals. It's not limited like D47 (another popular choice that carries at least one caveat).
Yet at the same time, when you've successfully completed your first ferment, don't be surprised if it tastes bloody horrible. Young meads often do, but IMO, K1V traditionals age beautifully.
If I find the thread(s) I'm thinking of, that outline how much YAN (yeast available nitrogen), you get from 1gramme of FermaidK, the same of DAP etc, I'll link it for you......
Oh, and the main reason people hereabouts seem to like Lallemand/Lalvin products, isn't because they're necessarily the best, but they do provide more data and info than any other producer. Which is generally very, very helpful.....