Update:
Race Fuel is gone....just wasn't growing well...sluggish. It was an extra bonus that came with one of my other seed orders, anyway, so no great loss.
Everything else was growing too slowly, as well, so I popped the plants out of the Solo cups check the roots. All the roots looked white and healthy...soil was perfect moisture level. The roots were just starting to circle around the bottom of the cup so I decided to pot them up into 1-gallon garden pots....added some Mykos.
I think the slow growth could be because of slightly cool temps in the cabinet at night. Now that they are in the 1-gallon pots, they are closer to the light bulbs in the cabinet. I'll need to keep a close eye on that so that I don't cook the plants. It won't be much longer before I move them into the tent. After that, I'll pot them up, again, into 3-gallon fabric pots.
Sometimes, I just pot them directly into the fabric pots from the Solo cups, but, this time, I wanted to be able to expose the roots to a second Mykos application before they go into the fabric pots.