my new live rocks are getting quratines for last 12 days...please tell me can i keep them in blue lights in order to form coralline algae.......? please advise
You can keep them under blue or actinic lighting no problem but that doesn't mean that you're going to get coraline. Water conditions have to be right in order for it to grow and if you don't have any growing on your rocks already you'll need to add some to the system by picking up a couple of pieces that already have coraline growing on it.