Wind damage

hi all

i have some small plants about 6ins tall but i have noticed that some of the leaves are starting to turn up is this wind damage.i am growing in biobizz all mix so i dont think it is a nute prolem at least i hope its not
ps i am using ph tested water an i test the soil every 4 days or so

How Old Are They And How Much Nutes .....temps ..ect Ect Ect Ect.....a Pic Would Be Helpfull Too...

they are around 4weeks no nutes coz im growing in biobizz all mix ph tested water soil ph is between 5.5&6.5 test every 4 days or so humd is at 65% temp is 26 there under 250 sun t bulb and reflecter about 10 to 12ins above them on a 18/6 timer fan runs on that timer aswell is there anthing iv missed

5.5 is a little low for me i like 6.0-6.8 humd a lot high in my opinon i am at 30% all the time the light i would kep at 12in plus... wait im stoned you said they are turning up right i was thinkig edges were curling up wow... umm mine do that too they are three wks old but they only do it after i water.. so i dont know man.... sorry i aint much help..