I came across some pure mdma with an odd fishy smell to it and doesn't work right. So, I'm getting a test kit next week. I've been researching all the reactions of various substances to various reagents. My question for you experienced testers is, for the main three reagents, Marquis, Mandelin, and Meke, the are several substances that produce little to no reaction, like mephedrone for an example. If someone were to mix high purity mdma at the right ratio with mephedrone, would the more violent, much darker of the mdma disguise the mephedrone reaction completely?