Verifying final flush technique

Just a quick question for you guys. This Saturday will be the end of my 7th week of flower. The buds are looking thick and juicy. Yum yum. I was going to start a 2 week flush this Saturday, but wanted to verify the use of Sweet during the process. My plan was to run Clearex all day Saturday, periodically swapping the water out all day until the PPMs are all but gone. At that point, I am going to run just PHâ??d water with Sweet for the remaining week and into the next week if necessary.

1) Am I correct in understanding that I should continue to run Sweet through the flush?

2) Should I be adding any of the other additives that I have (Liquid Karma, Hygrozyme)? Or just the Sweet?

Just in case it matters, I'm running a drip system with Rockwool. My girl is in a 6" rockwool cube that is on top of a 3' rock wool slab. I'm currently using GH 3-part nute with Liquid Karma, Hygrozyme, CalMag, Sweet.

Botanicare recommends running just Clearex for the last 2-3 days (or week). No Sweet, Hydroplex, etc.