the one i saw wasn't blue fading into yellow so it might be okay? @Mysteries , please DM me the name of what you bought when you can, if it was "PC" (which i believe is pro cure?) or reagent inc you got scammed.
both of you, buy "aquarium test strip"s and search the aquarium test on this website, nitrate will pass the blood test.
the only known reliable sources are IC and CSS, you might get away with it depending on your location and if you purchased from a legit company like a chemist.