Ok... so now that I have your attention... I went to work this morning and my tank was fine, all pretty... Came home8 hours later and my entire tank is covered in brown... Now I know they are diatoms and I have been having little blooms, but this is completely crazy. My sand is not white you can't see any white and the rocks went from white with splashes of purple to completely brown... I added a double dose of my C Balance last night, could this have caused this ridiculous bloom... Should I do a water change or just leave it until it subsides itself... My water parameters are all at 0ppm, nitrates @ 5 ppm...