Cheese in hempy bucket

This is my first grow with hempy buckets. My second indoor grow. I have 3 cheese bag seed that are all 1 - 2 weeks old now. I put them in 1.5 gallon buckets with straight perlite. I'm using gh flora series nutes. I'm feeding the schedule on the box for dtw. I'm using a 1000w mh for vegging and will use 1000w hps for flower.

Today some of the leaves are curling up on the sides. I looked around and it seems like the answer is too much heat. I had turned the fan blowing on the plants down a few days ago when we had a cool snap, but it has warmed back up. I turned the fan up and raised the light about 6". Now my light sits about 18" above the plants.

Here they are at three weeks old. They are coming along nicely i think.