Why are the lights on in the fuge from 10:30 am to 9:00 pm? Usually, they are on in a reverse cycle from the tank lights. Or, like me, people keep the fuge light on 24/7.

This shouldn't make the macro algae die, though. That bulb should be fine, too. I've use one like that before with no problems. Something else is going on. Maybe the liquid calcium?