ILGM Girl Scout Cookie- First Grow

First full week with seedlings. Given this is my first grow, I was a bit stressed about over/under watering. I have another grow tent with autos (ILGM Gorilla Glue) and they are growing so much faster than this grow that I was concerning that something was off because of the size of the seedlings. With my fear of overwatering, I may have under-watered a bit so I gave them their first semi-soaking. The medium seems to dry very quickly, but I am making sure to keep the humidity levels at least 60%. In an attempt to get things moving a bit, and since the cotyledons have begun to yellow, I sprinkled about 2 teaspoons of worm castings on the soil and gave them a good watering. They have perked up a bit but my only reference for seedling growth is my auto tent, which are growing like crazy. I am hoping to begin nutrients next week depending on how they look. I did also increase the lighting a bit to 50% power at 30" from soil, about 430 micromoles. Also added a thermostat controller to turn inline fan on when ambient temperature reaches 77 degrees F. The 6" inline fan I bought is almost too powerful for this tent, even on the lowest setting, so I won't keep it on consistently until I turn the lights up more and heat the tent. Let's hope they pick up the pace a bit next week when the soil amendments start to break down and feed the plants.