I have a VooPoo Argus GTll. It doesn’t like liquids that are mostly pg, because the tank leaks.
I have been using 70vg/30pg liquids (menthol flavour) but they seem to be now not available from my usual suppliers. I live in Spain, if that’s relevant.
I recently bought some bottles of Nic salts by mistake. Ridiculously strong! If I buy some vg base liquid that is zero nicotine, can I mix the Nic salts with that? Will it work?
Sure you can. You can mix any liquid with either or both forms of nicotine, but you must use your common sense. The calculator should help you.
Hitting an exact VG/PG ratio is the harder part depending on what you have to use, and if your nic salts are VG or PG.
Thanks! The Nic salts say they’re all pg.
Is an exact ratio important?
Looks like I’ve got some more research to do!
Not to me, but you said you’re using 70VG due to a leaky tank.
So what is the current specs of the eliquid have vg/pg/nic/ and ml’s, and the specs of the nic you have, and what nic you want at the end.
Oh dear. This is making my head hurt! 
The base I’m thinking of using says it’s 100% vg. I really don’t care how much nicotine I end up with. I probably wouldn’t even notice if it wasn’t there.
I was considering using a 10ml bottle, filling it about two thirds and just adding drops of the Nic salts until it tasted right.
Is this feasible?
Not really feasible the way you described it.
100% VG is fine. Most coils need PG in order to wick well enough to get to the coil so you don’t have a burnt puff. ⅔ of the way is 6.6 ml or 66% VG, luckily your nic is PG so that’s fine, but you should really fill the remainder with PG or flavours. Heading you off at the pass, but no you shouldn’t fill the remainder with water.
Thank you. I’m learning lots of stuff here! I shall do more research, especially in this forum, before I attempt any alchemy.
Welcome to VC, @Bluetina 