Hey Tipper, your plants should manage for a couple of hours. Not sure I understand about your reservoirs, maybe post a photo.
Let us know how it's going.
Sending good Karma your way.
Lindy
I agree with the humidity dome and heating mat. Four of my seedlings are in rockwool cubes and the girls (God Bud Fem.) look happy under florescent light 18/6 with the heat mat set at 72 degrees. Two others are just bag seeds that I got going about 1 week before the girls. They are in rockwool...