Quote Originally Posted by Iamthatguy
They are very weary of diluted samples so I can't dilute too much or they will know. I also can't color my urine as they look for the neon pee.
Who is "they" that youre referring to? Why are you being drug tested?

Neon yellow color can occur by simply eating foods rich in Riboflavin (B2) as part of a normal course of diet. The labs cannot reject a urine sample on the sole basis of a neon yellow appearance. Not without running the appropriate integrity checks first (creatinine and specific gravity).

If youre worried about overdiluting, you can always check your dilution efforts with a validity test strip that checks the creatinine and SG levels. Google search drug adulteration test kits.