I have an Angel in a small tank (about 40 litres) and a couple of baby
Electric Yellows.

About six or eight weeks ago I dropped a large sharp rock on him and took a
chunk of skin off him about 1.5 cm wide.

After a while he got pretty sick and I was sure he would die. But he's a
tough guy and has recovered a fair bit. However the sore doesn't show any
signs of healing.

He certainly isn't as happy and perky as he used to be. He doesn't even
chase his Prawn Pelets any more but just sucks a few fish flakes off the
surface.

A couple of days ago an Electric Yellow died, but I don't think it is
related.

Jim