I ph my water at 6.4-6.5 is that not a good ph level?
That's ok
Problem could be the soil. Did you use potting soil? If so, potting soil has a high nitrogen content.
If you water to much you also get those brass copper marks on the leafs.
Cause is root burn from the nitrogen.
Solution put some worm castings in your soil or mix it into the water when watering.
Some advice. My first rookie mistake was potting soil from a store.
Killed my plants on my first year.
Not only that, you get free fungus gnat eggs if you don't sterilize your bought soil.
Next time when starting a new grow learn how to make your own soil.
Saves ton of problems
Good luck.