My tank has been up and running for around 2 months maybe a little bit more. I recently added 1 clown, 1 watchmen goby, 1 firefish goby, 1 damsel(regrets that), 3 crabs, 1 cleaner shrimp, and 1 condy. Water conditions are fine up to that point I will retest when I get home. I also added 2 mushrooms and 2 kenya frags....since I put in these items everything in my tank has a brown tint on it including the rocks, sand, and glass. It rubs of easily but it is spreading. I did a bit of googling and it seems that brown algae fits the description. Once I get home I will take pictures and will test my water. But untill then will getting magnets help clean the glass and how can I stop this from spreading more. Thanks Stroid