I'd definitely recommend getting some ferts. Foxfarm makes some good ones.

I'd also suggest using a 1 part perlite to 3 parts of that ocean forest for your soil.

Water is water. As long as your city/well water is drinkable it's probably okay. If there is a hydroshop in town the people there can probably tell you what the ph is on average. If it's way off get a ph kit. They're pretty cheap.

One more thing, and I'm completely not 100% about this. You might want to just use your 6500k lights for veg. I've *heard* mixing the two can make your plants grow goofy.

I think I experienced this once myself. I was using a t12 floru setup. Had one 6500k tube and one 2700k tube. I was in the middle of germing some seeds for my current grow when one of my 6500k's went out. So I just swapped it out with a 2700k. All the seedlings that had already sprouted didn't seem to notice, but one that sprouted after I did the swap grew all wonky. It very well could of been a random mutation though. So.. someone else will have to clarify.