I am going from 2 39 watt t5's to 6 39 watt t5's. Can I just put my new light on the tank or will that shock the coral? Do I have to do it slowly? (that's what she said)
Start the new lights at something like 4 or 5 hours.Then after a couple of weeks,start adding 10 to 15 minutes a day to the time their own.
If your not carefull,you'll end up with a bunch of white corals.
What I am trying to figure out is after I run the new light for half of the photo period do I put back on the current lights or just leave the lights off for the rest of the day.
Get a few layers of window screen for the tank. Every week take a layer of the screen off and you are set. If you start with 3 or 4 layers you can run the new lights the full length you have been.