If you're germinating seeds I would make sure the PH is absolutely perfect, 7.2 is far from that.
For seeds/small plants I'd just go to the grocery store and get some distilled water or whatever you can
that will give you a pure start for the girls.
PH 7.2 will catch up with you in your grow so I'd figure out how to get that fixed either using a buffer, RO
machine or something of that sort.