also just found out the ph in my water is about 8.5 which seems too high. could i use water from bottles or carbonated water?
You should buy a PH meter if you want to grow seriously. Your PH at 8.5 isn't going to help, and bottled water will get expensive. In the long run, a PH meter will pay for itself.
Here is the one I use and it is perfect. I highly recommend it: Milwaukee PH Meter
Rain water is better than the 8.5 PH tap water that you are using now. So go for it.
Your temps sound perfect, but do you have the lights close to the plant? Also, give the rest of the soil a chance to dry out first, not just the top soil.