Minor curling

Just got home from work and check on my plants and a couple of leaves are starting to curl, they are 11 days old and one of the plants already has maybe 3-4 nodes. I know it could be the ph levels but i dont have a test kit (i know stupid) is there anything i can do in the mean time? The curling is very minor, i will upload a couple of pics shortly, dont have access to my camera right now.

What the temps? Multiple nodes indicate to me, that u have ur lights very close which is good, but maybe too close. Check ur temps first and go from there. Being that theyre only 11 days old i find it hard to believe that they're having ph issues already but it is possible.

i just had to raise the light a couple of inches, realized that a couple of the leaves could have been touching the tubes, they look pretty good, heres a pic of them from a few days ago. one is obviously doing better than the other.

significantly larger now, another node already,