i have ten plants in rockwool. one week old. most are like 3 to 4 inches tall. i have a hydro mix that has good PH and all the good nutrients you need. my biggest plant is currently growing its 5th and 6th leaves. the leaves have looked healthy and green but started getting yellow spots and now patches with brown spots and starting to droop. obviosuly not good! i keep a light breeze on em with a fan and have been giving em like 20 hours of light a day. 65 watt plant light about 2 to 3 inches above plants. mayeb too much light? not enough? too close? not close enough? over watering? not enough water? help before they die!