SO my new tank is up and running..my levels are great i'm wondering now that i have some mushrooms if i'm running my lights to long. My Tank sand and also rock have developed brown algae looking stuff. Now i've read that one person said his tank turned brown before the coraline started is this true. i know the next question are you using RO water..Currently now. But the growth didnt start until i got my Compact fixture and put in mushrooms with light dosing about 10 hours daily.