I personally do the third one but I flush for several days....until the ppms stop rising then switch over to plain RO and ph'd water.
Weedhound Reviewed by Weedhound on . Flushing with Final Phase...Zandor! Well actually, anyone can help on this question, but I’m going to be nearing the flushing stage soon, and since my entire grow has been piecemeal gatherings of what Zandor and Latewood would do, so I figured Z might best know how to help. Using Final Phase, I’m confused…On Advanced Nutrients’ forums, the instructions are to use Final Phase for one light cycle (12 hours), and then change out and run H20 for the remainder of the week. I’ve read a couple viewpoints over there on how flushing Rating: 5