new aeroponics grower

Hey everybody i'm a new grower, trying aeroponics. And i need some help, I'm finding leaves that are curling under, I'm not sure why. My clones are now almost into week 3. I had yellowing leaves but adjusted my nutes and they are now doing better. I also had heat temps going into 90f, 93f was highest, and fixed that prob, my room temp now sits at 83f constant, cools when lights are off. My water temps fluctuate between 60f and 70f, I'm currently playing the frozen water bottle game trying to keep up a steady cool water temp but finding it hard while i'm away at work. Anyways I can't figure out why some of my leaves are now starting to curl under, also, half my plants on the table are doing great and the other half are about half the size, they all came from the same mum, and are on the same res system. Any help would be awesome!:D

If u can lower the temperature to 78 max and 68 minimum then they should b happier. This should help with the res. temps too. And if you want successful crops in aeroponics, ph and nutrient ppm's are crucial measurements to know. 65 to 68 degrees f is the ideal temp for the res. Make sure no light is getting to the roots and very little light gets to the nutrients.

THX man, also, I'm at the stage to up my nute levels, I'm following all the directions on the bottles properly, my math is right, but is it normal for my res water to change to the color of my nutes? I can't find anything about this on the net. Before i was putting low nute levels for the cuttings and the nutes always diluted and the water stayed clear, now with the higher amounts my water is the color of microgrow? Any help would be awesome