Its sta-green potting mix from Lowes. I know its not the best, but its winter and they didn't have many options. My last grow I had horrible fungus gnats from their house brand compost mix, so I didn't want to use that again. I read the soil is a little hot, so I put some old potting mix out of a previous grow in the center so the plants will have some time to grow before they hit the stronger stuff.
So far my seedlings seem to be doing fantastic, probably the fastest growing I've had so far out of 3 grows. The last one I had to ditch because the plants were so stunted due to issues.
Yeah, it seemed like the water was going through the media, just not absorbing at all. I did some googling, and I decided to add a drop of dish soap as a surfactant to my water. I re-watered them with that about 15 minutes ago and the water didn't come out the bottom into the drip trays. So I think it was absorbed much better this time. I hope once I get the soil actually moist it will stop being like a dry sponge, and actually absorb some water.
I watered 2 days ago, and at 6 inches deep the soil was so dry it was dusty this morning.