Sure Jell

I don't even know if I'm doing this right, tried to make a forum & was completely lost. I am having so much trouble and I'm not sure why. Maybe I'm losing it. Anyway, I need help with a question I have, the internet is great but it says 2 different things at 1 time & I got sick of google. So if you can, please help.

I am supposed to take a piss test for SAI in exactly 1 week. And I'm sure my urine is dirty with thc. I haven't smoked in about 2 days, & I have been smoking once a day for about a month now. Any ideas as to how I can pass this shit? A friend of mine says sure jell (pectin) works, but I need to be sure. Don't wanna take any chances... & do you think I will be ok as long as I don't smoke this whole week & drink hella water? My metabolism is fast as hell & I weight about 120. PLEASE HELP