Humboldt Magic Melon Auto - Seed 1

Put the seed in damp paper towel inside a small ziploc bag. Put it in the tent on a heat mat inside a humidity dome under 18/6 light schedule (7:00 PM to 1:00 PM). Tent is on cement basement floor so the heat mat wasn't getting up to temperature fighting the coldness of the floor. Threw a towel underneath the heating pad to try and cut the cold, and it worked like a charm. Seed went in on June 21st, saw root in paper towel on the 23rd, moved to a rockwool cube that day. June 25th notice the top of the seed and noticed what might be a cotyledon? Update: by the end of the 25th plant had sprouted, 2 cotyledon leaves and some really small first leaves Temps between 25-29, and trying to keep humidity around 75%. Finding it tough to keep the humidity level in the dome consistent, trying to figure out the best combination of exhaust vent level, and how much to open the vents on the dome.