I have several and only a few seem to get infected. The reds are the worst I started with 8 and now I have one female all died the same way that slime within six months. Next would be the Turquoise I have three of six. Also I have one Parkinson left and three McCulloch's. In my 150 gal. I have two Australian and five Emperor Rainbows that have not shown any problems since I put them in eight months ago and they are in the same water conditions.