banditpowdercoat
11-09-2007, 03:53 AM
OK, I have all of a sudden goten some dark discoloration on my rocks and some fake plants in my tank. Water is good, no nitrites or amonia, but is very hard water(RO unit coming soon) I have added a bubbler in one corner for some added looks. Could the extra o2 caused it? What is it? I'll try to get pics later if needed