people stop at different times ,
i stop feeding my plants nutes about 2 - weeks before harvest
and then i just give them plain ole tap water ,
but i would normally boil my tap water first to purify it some ...
EDIT ,
i would feed every 2nd watering so your allowing to flush some salts out... last thing u want is lockout bro,
i locked my shit out a few years ago ,
i watered with nutes all the way through lol
im not saying i had nute lock
i just didnt get them flushed out , lol
i had a good high , but the hangover was terrible
the back of my head hurt so damn bad it
it was like my brain was trying to literally explode out the back ,
( never again ) fuck that shit yo ` lol