You mentioned in your first post that you took a home test and "failed miserably". You may or may not of failed "miserably" because there is no way for you to accurately know exactly by "how much" you failed. You just failed. My point being that the lab you test at isn't going to be able to find a "level" of THC metabolites in your body............they are just going to see if you are above, or under, the 50ng cutoff point. Your only concern is to make sure your levels are under that point. The more water you pee out, the less concentrated the metabolites will be..........thereby lessening that number to hopefully under 50ng. Dilution works.........so make sure you are very dilligent about following the sticky..........and like I said, if you are worried.........drink more fluid. Worst case scenario is they ask you to retest...........or question you about the diluted specimen.........to which you could say you just got over food poisoning, drink alot of water, just worked out etc. IF they even question it..............I peed almost straight water and passed............no questions.......nothing. The main thing is try to relax...........at least you aren't going to prison or anything IF you fail........worst thing that can happen is you miss out on ONE job. Good luck and I'm sure you will be fine. Most things we worry about never happen anyway!