Quote Originally Posted by Rusty Trichome
Ok...I'll bite. What's the tap water ph, and where does it come from? The city or your own well...? If the tap ph is witin 6.3 to 6.8, I'd use it. If it smells like chlorine, let it sit overnight.

You've given two ph numbers. 6.4 is borderline low, which is why nobody has mentioned it...but 6.2 is too low. As the peat-based soil ages, it will begin to degrade, and lower the ph even more.
when i was using tap water the ph was high like 7.4 if i remember correctly so i had to bring it down all the time, i have since moved and havent checked the tap water, mabye i will check it ph