I have smoked non stop for 8 years and smoked weed for 10 have grown for 8 years and in the 2ed year i quit for a week and drank Hella water and cran juice no piss drink and passed. All the other times i have used a drink and have only been tested 2 more times sence then. All i know is the time/ ratio on weed is effected by you Fatcell count. so bigger you are longer in system and flushing helps alot wana get your liver and kidneys working over time to clean you up.