wilting SC plant

SO i guess im haven a small problem .....I have a sum SC clones im growin and one of them seems to reacted to sumthing i have done which is not much ( the first picture is of the wilted SC clone) could it be the fan i have next to it could the fan be drying the plant out like a windy day drys out our skin .....
not enough water im pretty sure i give it enough tho ........im just not sure ....
the first pic is the SC clone lookin a little wilted the second pic is of another SC clone which is setting next to it and the third pic is of an afghani clone which also is right next to the SC clones and the second and third plant look just fine ?? what am i doing wrong??

what is the ph of your water and soil.

good question ......I checked my water and its at 7 but i have yet to check the dirt i think i need a soil test kit.
word up

If your fan blows on a plant constantly, then you called it, suffocation.

HTH