About the nutrients; don't be worried, I was too at first but once you get her dialed in you'll be ok, remember more is less, specially when shes young. There's ALOT of Waterfarm grows in this sub-forum; that's what helped me along as I started my own, SCOTTYBALLS grow being the model for most of them out there, truly amazing results. Hey check out
this journal that also did SugarPunch if you end up going with her. About the water , that tap water level is actually good, and the pH is surprisingly low to be tap water. If you can't buy some distilled water or have some sort of RO filtration system, that tap water will do, you could put in jugs or something and let is sit for a day or two, your ppm will go down a bit and you could mix with some pHdown and you'll have some decent water. The lower the ppm's the better because you can control your nutrients better in a sense; for example:
Your last reservoir change was to 400ppm.
case 1: Your tap water
water ppm: 100
case 2: RO or distilled water
water ppm: 5
Let's say several hours pass and you check your water to see the ppm levels. It reads 367ppm. In case 2 you know for sure that 99% of those 367ppm is nutrients so you know exactly how much she has consumed in that time span. In case 1 there is no way of truly knowing how much of those 367ppm is nutrients and what's water minerals left in the reservoir so it makes it a bit harder to have a clear picture of her nutrient uptake.
Any way hope it helps. Keep us posted.
I'm glad to hear that my water will do fine. I did not want to have to keep purchasing distilled water all the time. I can't afford a RO unit right now. I had one, but it froze over the winter and broke.
Check this thread out. Helped me out TREMENDOUSLY.
https://www.rollitup.org/grow-journals/344359-pineapple-express-g13-labs-seed.html