I maintain my friends 29 gallon tank. It has 2 big long finned black tetras and a common pleco about 3 inches long. And yesterday I saw his tank and the black tetras were pale looking. Their fins were almost clear and their body was pale. Why is this? And what can I do to bring their color back?
Unfortuantly I was only able to save one of the blue gouramis because the tetra died of no heater and no oxygen and the betta and the other gourmai had a red sore on them. Now the tank has 2 long finned black tetras and a pleco. But a couple months ago it had 2 blue gouramis and 2 black mollies in their to but they died. Could I put 2 angels in their?






