So I started up my 40g tank 2 1/2 weeks ago, it cycled in about 1 week( I used cured live rock and live sand). I started using lighting on Sunday, for about 6 hours a day, I haven't put my protein skimmer in yet, and Im waiting on my media reactor to come in. But just today, my water has gotten somewhat cloudy (it was super clear before) and I don't know what it is, its like fine particles throughout the water. When I pulled out my filter socks they were dirty, but when i picked it up, it released more particles back it. Could i just be stirred up sand or something else? I just don't want to screw it up.