Leaves curling Under...

Hi everyone! Im a newB have a question about my first grow...Im growing indoor using a 400w MH. I am only 2 weeks into veg and I noticed yesterday that a few of the leaves are starting to curl under. I have not used any nutes yet and I tested the soil and water PH and they seem to be where they should be... I searched this site and found info stating that usually when the leaves curl upward, it could mean too much heat or not enough water but I couldnt seem to find anything about the leaves curling under. Any help or tips would be great!! Thanks and stay high

If the curled parts are brown it is more than likely heat damage, just get a fan or a humidifier (be careful with that thing, it opens up a hole can of worms). If they are yellow it's nute burn, but I doubt it because you would have much worse symptoms before that.

Check your temps, you want it between 23c and 30c (for a ballpark figure).

Thanks Plasma! There is no discoloration on the leaves so that's why I was a bit unsure. I do have a small fan blowing up to help circulate air flow and it doesnt seem to get too warm in there but I have not checked the temp so maybe I should do that. I read in one thread that it could possibly be over watering?? Thanks again!

Hmmmm, how often are you watering? Even with crummy drainage it shouldn't be a problem.

Well I haven't really nailed down my watering schedule but I have been kind of going off the weight of the pot and by checking the soil to see how dry it is. After I read the thread that said it could be over watering, I didn't water it that day and then when i checked on it this morning it looked like another leaf started to curl under so I gave it a tad more water. I'll check on it after work and see if there was any improvement...if not, ill be sure to try checking the temp. Hmmmm....Thanks