My tank is 26 days new I understand that brow alge is part of the process and it feeds off of nitrates mine are at 10ppm. I'm seeing brow algebra under the light only. I've been running my light now about 6 hours a day since adding my clowns on the 15th. I've read that not supplying enough light hours can promote brown alge. I'm just curious is why am I only seeing it under the light ? I now it will spread. I also have sand what do you use to clean the sand with. I don't want to use a sifen that I have for gravel I see how much sand I can lose ? Thanks in advance. The pictures don't show the alge it's just starting. Just want to show the light I've been running its on setting #1 and it goes up to 100.