RollinG/curling Leaves. Please Help FIRST GROW

OK, so i am looking to see what would cause this. Some of my plants look like this, some dont. Need advice on what would casue this so that i can remedy it...

My set up is as follows, they are roughly at day 18 of veg, they are under 2 400 watt MH lights (at about 22-24'' above the plants).. The temp is at around 75-77 during light hours, humidity is at around 55%.. have good circulation of air through the room... So i figured i was doing ok til some plants started to have their leaves roll up like this. Thought the light were cooking them so i moved the lights up to where they are now from about 18''... And the leaves are not crispy or anything, they are still soft...

Also i thought maybe this was casue because i gave my plants natural spring water for ahwile til i ran out then went to tap water, which i recently found out had a PH of around 8 or so.. So not i hae the proper PH stuff to get that in line.. Also waiting to receive my soil PH tester and digital water tester to have more accurate readings... just tested one plants run off and it was at around 6 ish... SO?

Any and all opinions would be appreciated, critisim is welcome but not really appreciated. LOL

Do you have a fan blowing on the leaves? Could be wind burn.

Car247 said:

My bet its the light

Click to expand...

My first thought was heat stress, but he says his light is 20 something inches away and under 80F in the grow area. Almost impossible to have heat stress with those temps.

Dude, 8.0 PH is to high. You are getting lock out. lower your ph to 6.5 and keep it there

this is very helpful to me.
You see how 6.5 allows almost all nutes.
6.0 is to low and 7.0 is to high.
you could keep it between 6.5 and 7.0 to insure N-P-K and Calcium and Magnesium (most important nutes). Iron and Manganese the nutes allowed in under 6.5 (in soil)\

dont overwater, plants dont like moist soil for days on end. bags tend to not allow the roots to breathe. Remember roots breathe Oxygen and plants foliage breathe CO2.

Thanks for the chart... and i know my PH was too high for a lil while, hopefully i have that under control now....
Wind burn?? never heard of this and dont expect it due to only some plant having it and they arent only the ones near the fan.
ANY OTHER SUGGESTIONS?? hard to believe that i have only recieved a couple ideas...

looks like light is too close, folding of leaves inwards is a good sign of being too close to the light .

Really? as i stated above though - lights are roughly 22-24" above the plants... I figured i was safe there...?