GH trio supplement

[Smoking Frog]

Been using GH trio only from the start one year ago.5 grows later and stil happy with results.
Got a store credit where i buy my stuff.
What supplement would complete my GH trio and give a bit of boost to my yield?
In coco...
Thanks!

 

[Garage_Grower]

They have a simple and expert program, not sure if you seen that! If you picked up some Liquid Kool Bloom you could use that as a simple pk booster in flower.