two gallons? are you joking? :wtf:

creatine takes time to manufacture into creatinine, which is what drug tests measure. taking creatine the morning of the test is NOT going to help.

B2 is the stuff you need to color your urine yellow. It is also known as Riboflavin. Your magic pill is bound to have some of that.

Read the dilution sticky. It'll tell you how much liquid you need to consume. substitute a sports drink for some of the water to maintain specific gravity.

you might want to read the substitution sticky too.