Shall I I switch from 18/6 to 12/12 nutrition help please

if you wanted to change your nutes a bit, you'll want to raise P a tad.. but keep the others roughly in line with what they were. if oyu use the labels and create a spreadsheet like the picture in my diaries, you can easily do this without fear. otherwise, blindly raise the one with your main P source and increase it slightly... very slightly, lol, if doing this blindly without aid of math and forethought. the initial switch is a transition.. the hormonal balance changes.. so over the next 3-4 weeks it's switching from vegetative growth to bloom growth.. you don't want your "bloom formula" in use 100% before that completes.. some sort of transition over that time to a higher P is likely a good idea -- but still unproven as of yet from what i know, anecdotal evidence aside for a good reason. as long as the plant doesn't show deficiencies and things are avaialble for it to use, it's likely close to optimal. you start doing this and see more issues in canopy over time, recognize it is likely due to this behviour. this can likely work,b ut will require a tone of trial and error and observations/notes to help guid over a long period of time that is just too difficult to encompass fully without the aid of notes and data. like trying to guess someone's batting average after watchin 1000 PA... just not going to be accurate about it.