Correct...if 6.2, then 6.0-ish. Perhaps down to 5.9-ish. Tiz One of the reasons I try and hit the middle mark. Minor diffenrences aren't as traumatic as long as I'm still in range.

Most I grow start filling-in after the 4-6 week mark or so, depending on the strain, lighting, growing style and techniques used. :thumbsup:

I'd flush a few days before harvest, but I'd delay harvest as long as possible.