when is a good time to take it off? my seedlings are about 5 days old, one is about an inch and a half and the other about an inch. is this normal? also i heard using a fan to create a gentle breeze will promote a thicker stalk, when should i start to use a fan?
Take off the dome once the clones have been rooted. You can start using a fan, just when they're young and fragile make sure its LOW. You can increase the strength as your plant gets bigger
take off the dome...you run the disk of keeping the environment to wet and creating a climate for root rot in the young roots. a small breeze will harden them off and make them strong (for those eventual big colas of BUD)