How to bring ph down

Need help today This is my first time grow an I have a ph problem to much akline how. Do I sort this an am use canna nutrients now when it comes to veg stage do I mix a and b with the others or do I do the others separate help ??

The best way is to start with RO or Distilled water, but if that’s not an option, Acid, or pH down.

Most use Phosphoric Acid (pH down)
I use Muriatic Acid.

Aquaponics/Soil/Hydroponics, although fundamentally setup different in pH ranges, how the Carbonates work, is the same.