I have the biocube 32 and 4 clownfish. I know fish sleep. But my lfs said to leave the light all the time. White in the day and the blue at night. But I read online that if I do that they will stress and die. So which is true do I leave the lights on all the time, or do I have the blue light on only for an hour. I just change the light from on all the time to 8:00am sunrise, 8:30am sun is up, 7:00pm sunset....then, 11:30pm moonrise, and at 1:30am moonset. Please help.