cover the top of the rock wool with black plastic u can spray the fungis with peroxide and cover it also it will die just get some black plastic make a slice and wrap it around the stem and cover the wool
just look at the second to top node on the main stem if their female there will be white preflowers coming from where the branches come off u cant miss them
also u might want to lst them look like their getting tall
any natural gas generator as well as any propane will do the job as long as u get one with a high enough amp and watt rating it all depends on how much u want to spend they make em that will put out up to 30kv per day which is enough to run your home a/c on with a fridge 3 or 4 tvs a computer or...
i just got some bubble gum from buydutchseeds ill let u know when i start em i have too many others going right now so i got to wait lookingforward to seeing how yours do good luck