Quote Originally Posted by jetblack332
I figure every little bit will help..my plan is just to drink water all week, excercise..then drink a gallon or so on test day and a b2 vitamin..
Like Diege said, drinking water days before the test is of no help. It may cause frequent urination, but it has no effect on GFR (the rate in which THCA is filtered from the bloodstream by the kidneys). Drinking water is only good on the day of the U/A - and not a gallon of it either. For proper diluting, read up on the Dilution sticky thread

Quote Originally Posted by jetblack332
If you get a substitute or urine froma friend, how do you keep it at 98?
Read up on the Substitution sticky thread.