I just set up my ATS, and today would be the sixth day. I have been running the lights for 24 hrs. My rocks in my sump were turning brown. My question would be, should I removed the rocks and just run the ATS only, cause I am still running my protein skimmmer and I am about to remove my filter sock on the next water change. But check out the pictures and let me know what you think? By the way, my tank was just cycled 2 weeks ago prior to running ATS. Thanks guys.[attachment=0:3ppjpwwi]3_16_2001c.JPG[/attachment:3ppjpwwi]