Just wanted to get a couple opinions. I have (had) a ton of cheato algae in my fuge. Over the past month or so, it has dwindled down significantly. Only two things I think could be the possible culprit, but don't know. 1) Lighting. I only have a regular household (though I thought it was a 6500k bulb) bulb over it. Do I need something different? 2) I have two urchins I put in there awhile back to take care of some cyano and other nuisance algae. Do these eat macro? I ask, because I've NEVER seen them eating or even near the stuff. I have only seen them staying on the rock in the fuge. Maybe both are the issue??