Hey Jug, be careful with that stuff. It is a chelating agent, which helps solublize materials that have fallen out of solution. As such, it will raise your EC rapidly at first, but since it is not a balanced nutrient solution the best thing to do is flush it. The best way to use magic clean is in small amounts continuously.
On the subject of flushing in general; I run a hybrid RDWC system that also includes chowmix in net pots and top drip irrigation. I flush and refill with fresh nutes at the beginning of bloom, at 3 weeks, 5 weeks and finish flush at 7 weeks.I do not rinse my substrate between runs, and I do not sterilize anything. So the only flush my plants ever see is a quick between nutes flush and the usual end of life cycle flush.