What is your medium, pH, temp, RH, feed? Purple stem can happen for a few reasons but until you dial in the basics, you can't fine tune the system. Most often when problems arise, we like to drum up a quick remedy when in reality we would only be exacerbating the problem. Sometimes the answer is...
Nute burn as mentioned...don't feed every time you water. Make sure you have a day per week of just pH'ed water to dissolve built up salts. Nute burn is the most common mistake..dial back on the feed as well.
As mentioned, everyone will metabolize THC at different rates so it isn't clear cut. You can dilute your pee by drinking lots of water the day of the test and peeing several time prior to test. You will need to take vitamin B supplements to darken your urine as it will look watered down. You...
You both have some good points for sure but I wouldn't chance it when it comes to electrical. If by chance your house catches fire, insurance companies will find any excuse to not pay out. I see all kinds of gross code violations too. The most recent...neutral and hot reversed on a plug with...
As mentioned, you don't want a bandaid solution to a very serious issue. I'm with alwaysgreen420...get a dehumidifier if can't get the humidity under control any other way.
Man that soil is hot...you should have grabbed something peat based like a starter mix with low nutes or Promix which contains NO NUTES. I would re pot them as mentioned since they look pretty bad.