I guess I should cut back. I run my blue stunners for two hours pre and post the metal halides which had been running 12 hours. I recently cut back to ten hours.

I guess I can cut them back to five and see what the corals do. I originally put them up at 12 hours because I've only got the one 400 watt bulb over the tank.

I have two (2 year old) 36" blue and pink T5s running on the same timer as the halides.