hurt fish

Hi all. I have had this clown exactly a year now. It's had this spot on its side since shortly after I got it but it's always been quite small. In the last few weeks it's gotten to be quite large and I'm not sure what it could be. It's never caused problems but lately he's been having trouble...

My file fish got stuck between a rock and the glass 3 weeks ago. Later on that day my file fish fell to the sand and only gets up to eat food i drop. Most times it wont eat unless food is given to him on the ground. He stays on the ground all day long now and only moves when food is being fed to...

Is there a way to make wave pumps safer for smaller fish? I have a smaller YTECH 6W wave pump that works for my 30gal, but a banggai cardinalfish (maybe 1" long including tail) got hurt after he got sucked onto the side of the pump and was stuck there for an unknown length of time (it was...