I have a 30 gallon tank with fluorescent lighting, but i have a reptiglo bulb in it. My fish seem more settled and happy with the light off, my Demasoni doesn't chase them as much... Could the reptile bulb be making my fish unhappy? Or should I keep the lights off more than 12 hours a day? I only have 4 cichlids in the tank so they shouldn't be that uphappy...