Germination process should be done very naturally for better growing experience.Just like how nature does. Wet the coco with a litle bit of calmag,put the seed in the pot, keep the light off until they sprout. 73F is 22C which is in the good range. I never transplanted my plants,never needed it. And you know what, I haven't had a seed not germinating so far. Good breeder and good growing conditions makes a good grow. The pH im feeding my plants at is 6.1 in veg and 5.9 in flower
by the way,if you can find get some full coco without perlites,to get the basics. coco is an excellent medium itself.Highly aerated and almost immediate nutrient effects you'll notice.