Young plants please help

Yo all I'm a newbie got got my babies started indoors to put out next month,I have a couple of problems with my plants, one has a leaf cracked in half the plants a little darker, one has minute yellow patches starting and ends of leaves seem to be curling, they are just their weeks old seem to be growin well despite that, they were given plant magic rock dust and 1/2 ml plant magic catalyst at transplant they are in a cupboard with a 250 w cfl 5 inches away and a small fan what can I do to help also got a few ends like shrivled up