Water quality is much better now. The carbon filters are covered in crud and will be replacing them shortly. Went to the LFS and noticed that one of the chromis in their tanks (where I bought mine) had the same red sore developing on it. So I grab the worker and ask what it is. She says it's partly stress but most likely a fungus, so she points me to a bottle of Rid Fungus. I buy it then research it on the internet. It describes how types of fungus will get into the fish's gills and cause them to asphyxiate because they aren't getting enough O2. It also talks about the same red sores I see on my fish. So hopefully this stuff will help out with my fish and I can move on to making the tank look better. Thanks again everyone.