Plant leaves curling up after repotting

Hi, a friend has a small grow, he recently repotted his plants into a 20 gallon tote from Home Depot. Hours after we repotted these little guys a few of his plants started to curl down. I have a picture of this also.

Any suggestions would be great as he is new to this whole thing.
Thanks

Title says curling up, post says curling down?? Post the picture. Curling down could be the roots are too wet or Nitrogen is too high among other things. Curling up could be heat stress among other things. Are the leaves "tacoing" up on the sides?

I have put up 2 pictures of the plant with the problem. It's cupping cupping down, didn't have the problem before I repotted them into a self watering 20 gallon tote. It only seems to be the one plant doing this too.

Transplanting stressed the plants some.
Don't over water. Moist soil, never wet, they'll recover. They just need a little time.

Good Luck on Your Grow.

I agree with topfuel.

That soil looks like it is going to retain a lot of water. Be very careful not to allow them to get water logged. Try to keep your temps in range 72-82 is best, lower than 70 and you may be waiting a long time for the soil to dry out between waterings. When they get bigger it will be less of a concern. Good Luck

Thanks for your help.

The soil came like that, already moist I just added a little water and figured I would let them sit for about 4-5 days before watering again. He has them in a closet with good ventilation, and a small house fan. Temps stay between 70-77 degrees. These are about 3 weeks old now and I'm not sure if they look healthy other than the one curling down. Any and all suggestions are appreciated.

They do look a little too light green, but you have transplanted them into fresh soil so they will need time to adjust and will likely green up with the fresh nutes in the soil. Don't give them anything but water for at least 1-2 weeks IMO. If you are watering with tap water I would recommend filtering it with a britta or using store bought water.
Not sure if you added epsom salt or dolomite lime to the soil. If you didn't then down the line they may need supplementation with calcium and magnesium. Next time add some perlite and some dolomite lime to the soil mix (at a minimum). Keep the watering under control and I think you will see them perk up within a couple days.

He has been using tap water, I have read to let it sit for at least 24 hours to let the chlorine evaporate. I started doing that a couple days ago. Will switch to bottled spring water next time they get watered and again thank you for the tips. My friend is new at this and he wants to do it right. It's not as easy as growing flowers in a garden lol.

They wont need watering while they are going thru transplant shock.

Transplant shock, totally normal. They will come right back