I told you that
Heavy 16+
Aptus will make it. Anyway. Try to get Hy-Pro or Metrop as base. Will rock even more. I know both of the manufacturs. Like Metrop more than Hy-Pro.
Aptus got the best additives on the marked right now. You don't really need the Regulator. Just get some silicate in there. GHE's Mineral magic will do the trick. If you use Metrop as base you don't need the extra p in blooom from
Aptus. 100% coco is fine, but 50/50 mix with hydroton will crush your current results. You will have to water more than now.
The question was asked hundret times perhaps, but tell me how much coco do you use in 4x4? Really like the idea to work in beds.