Correction to my previous post. RapidStart is listed on the feeding schedule for the Flora Series during Week 2 thru Week 9. I guess I should reed more carefully.
I've never used it, as the roots seem to reach the nutrients in 7-10 days after set up. I'm starting with well rooted clones in rock wool, with roots visible on the bottom. The rock wool block goes into
the clay balls.
Other than CaMg+ I stick to Micro, Gro and Bloom. The resulting roots are massive. The air stone helps with the anti bacterial action of 02.