I have brown algae (or diatoms if you prefer) on my rock. I have no livestock in the tank yet and I’m not sure how it’s happening. I’m running Chemipure elite and I have two Koralia Nanos on each side. My temperature is at 76 degree Fahrenheit. I’m using an aqueon canopy lid with the light that came with it. I have had my whites on for 8 hours a day running from 9 am to 5 pm and my blues for the rest of the time. Is this brown algae bad for my tank?