Good morning everyone. I have had my freshwater aquarium set up for about a month and it looked beautiful until this week. I'm noticing some sort of "orange stuff" on the rocks and fake plants in there. The water is still clear and beautiful (no discoloration) and the fish are doing great. Can anyone tell me what this stuff is and how to get rid or it?? We do have a water softner in our home and I'm wondering if this is what might be causing this (incorrect ph etc) because in the past I had a 100 gallon freshwater aquarium and never had anything like this in it.