Hi there, I have a humidity dome with 8 seedlings in it, and running a 35watt gro lux tube, they are about a week old. I germinated the seeds on damp paper towel on a plate, left in a warm place, once greminated I then placed them in pre-soaked rockwool, and then into humidity dome. Guy at local hydro shop (who sold me dome and light) told me to leave the seedlings in dome for three weeks. I'm sure the seedlings are stretching, and one or two of them are getting close to the top of the dome. They look quite healthy, but they have tall stems. What should I do, if anything?? Also, is it recommended to use humidity domes??