Simply using good water versis using chemical nutes will have no effect on the level of THC in your finished product.
If you're looking to us organic components, I would suggest you might want to follow Subcools Super Soil recipe.
Here's a link - go to the first post. https://www.rollitup.org/organics/539844-subs-supersoil.html
I wish you well & welcome to RIU.