I didn't read back but what are your phosphate levels like right now? That you are using a GFO while in a dino thread is unconventional to say the least.not really clear, if i rase po4 and no3 (i have to remove rowaphos) , it will be much longer to start zeovit. raising to remove after doesn't look a great idea, or not?
Zeo is a bacterial method that is scarily effective at processing nutrients. You do you. How fully you understand the chemistry of this method will become pretty obvious very quickly. Good luck. Impress us all with your full tank shots of pastel corals. I have seen some beauties before for sure.