The tank is a 55g. The silver dollars are 4", braziliensis 3-4", balzani 2-3".
Parames are: pH 7.4, ammonia and nitrite 0, nitrate 40
This is after a 30% change and rinsing out the filter (FX-5).
The tank has slate tiles on the bottom so substrate accumulation is not the problem, I vacuum any detritus under the tiles each water change.
They are already looking better and I might be overreacting here. Never kept these type of cichlids before. They are flaring their gills at each other, chasing each other around the tank, and looking like they want to spawn. Two of them have layed eggs twice before. I am starting to think that these are wounds from fighting and not hith since none of the other species of fish in the tank are having any signs of this.