(update) I have been changing water more frequently and have a carbon filter running with two cartridges in it. The water is now much more clear, though not all the way yet. I'm feeling better about the water condition now. BUT...now I have another concern. I just lost another green chromis the other day, I was kind of expecting it because he wasn't eating. However when I tried to scoop it up to remove it from the tank, I flipped it over and there were two large open sores on it's side. Now the third is acting shy, won't eat, and is breathing heavy like the last one did before it died. And the last chromis is acting just fine right now but I'm starting to notice the start of a sore on its side. The other fish I have is a blue damsel and it's a trooper. He's happy as could be. Checked the conditions and all is good. pH 8.4, ammonia 0, nitrate/trite 0, and salinity is 1.025.