Pectin products are a myth. The quart of gatorade and the additional quart of water is what serves as the "mask" - not the pectin. They "mask" by diluting the THCA concentration thats present in the bladder. The concentration is "thinned out" enough for the urine sample to register below the cutoff thresholds of the drug screen. This is the reason why people were testing negative. They wouldve tested negative anyway just on the water and gatorade alone and without the nasty pectin to go with it.

And the process of the so-called "masking" (read diluted state) does not last 2 days. Once all of the fluid intake had been urinated out, the "dirty" donor will resume testing positive for THC. Therefore, drinking a bunch of fluids days before the test is of no help. It has no effect on the rate in which THC metabolites are filtered from the bloodstream by the kidneys, and deposited in the bladder.