Oh before I forget, another tip.
Google "Flushing". You won't find a single article about Flushing, other than on mj forums. If you can find a single article that is from a university study, or anything other than a forum, please let me know! I've tried to find anything, even a scrap of info about Flushing that is from a reputable source such as a college study or peer reviewed study, a botany study etc, I couldn't find a single thing. Only posts from icmag, rollitup, thc farmer or similar forums. Nothing from people that study horticulture or wrote agricultural books. So imo, it is just one of those things that caught on for some people from hearsay I guess. Someone told someone (probably the first person that created the term Flushing over fed his plants, then didn't over feed, and said, well when I over fed my plants then gave them water for a while, it came out better. Something like that I'm guessing lol