Per gallon mate or i always go per 4L so i run slightly weaker.
My mrs smokes mate, more then me usaully lol all day her, before i got with her years back i was a propa stoner an she didnt smoke used to give her a few puffs of me spliff an she'd be mashed lol....then the tables turned, but with the preggy she be a light weight again once shes had him lol, but she says she might not start again now shes gone with out for the 1st time in years. it would do my nut if she was on ere pokin her nose in lol fuck that!
Gimme half hour bro! lol