PH runoff is only 5.5

Well this is day two of my grow and I have questions. I transplanted the girls from thier rockwool cubes into a 6 inch pot of roots organics. Unfortunately the guy I got the clones from had already started using a hydro based nutes regiment. So when I added JUST my water today (water is approx 6.5) The runoff was waaay too low at about 5.5. Now I"m chest pains thinking I killed my poor babes with improper PH. So my question is should I adjust the remaining water to 7.5 for the next watering (2-3 days) or should I just keep using the 6.5 water for a the next few waters and flush the low nutrient solution out...any and all help is much much appreciated.

Just go with the 6.5 to flush. Often, young plants get frazzled trying to acclimate to ever-changing conditions. Runoff at 5.5 isn't a huge deal anyway, but I wouldn't overwater those rockwool cubes. Semper, Jarhead.

Ohh Rah Devil Dog....thanks for the advice..plus 1 rep for you good sir