So recently I have had a problem with aggression with my pair of tiger and albino oscars and have made a weird discovery. I have noticed that my tiger will only attack the other Oscar when the light goes into it's night cycle and the moonlight function turns on. I have watched them closely on different modes like sunlight and not on at all and there is no sign of aggression or any attacks but as soon as I put the moonlight one on my tiger not 2 mins later decides that it's fight night. Any thoughts on this? Could it be a different factor?