Check out this link.
http://www.wired.com/wiredscience/2010/02/ultraviolet-fish-face/
That would be cool if all you had to do to calm mean damsels was add a very small uv source to the tank. Makes me want to start a damsel tank and experiment.
http://www.wired.com/wiredscience/2010/02/ultraviolet-fish-face/
That would be cool if all you had to do to calm mean damsels was add a very small uv source to the tank. Makes me want to start a damsel tank and experiment.