In the morning I am going away and will be back Sunday night. With my freshwater tanks I am just going to keep the lights off the entire time, but Im not sure how well the corals would do in the reef for that length of time... I would assume normally they would be ok with the lights off for that long, but my white pom pom xenia, hasn't been doing well latley and I think it was because of lack of light. The last couple of days I have the left the lights on longer and the xenia seems to be doing much better. Now I am scared that if I leave the lights off for about 2 days that it wont be good when I come back.... What do you think? Should I leave the lights on or off in the reef tank?