jkcrumb
Member
I currently have a 125g tank with 170lbs of fugi live rock that is only about 12 weeks old. I have had this brownish red (almost black & somewhat translucent) film starting to cover my live rock. Any help on this???? Is this bad?? I have noticed some before but not at this level. All my levels are fine and I just did a RO 10% water change 2 days ago. Thanks in advance!!!