Get BioGrow as well. Grow, Bloom and Topmax are meant to be used together during flower.
I used only Bloom at first but i had N deficiency later on so i needed Grow. I also had K deficiency because Bloom has higher P thank K, and with Grow you also add some K. And Grow contains lots of molasses which is useful in flower.
I also suggest get Epsom salts because i personally had magnesium def as well.
And if you're just starting get Root Juice also.