What fish do you think is the most disease resistant?

[mike31154]

My current set up has been running something over two years and I haven't lost a fish to disease. There have been losses due to other reasons.

Here's the lineup (loosely in order of when they were added):

Maroon Clown & Blue Devil Damsel
Mandarin Dragonet
Copperband Butterflyfish (died of starvation)
Lawnmower Blenny (1. sucked into powerhead, newb mistake, 2. Jumper, 3. still with me)
Maroon Clown #2 (went through the difficult pairing process, now I have a spawning pair)
Yellow Tang
Singapore Angelfish
Blue Green Chromis x 3 (all gone, predation & bullying mostly)
Mandarin Dragonet #2 (recently added, thought it was female but is male, need to monitor since I now have two males, so far so good, huge size difference)

Last week I turned my ATO on manually to top up the tank, forgot about it, went shopping for a couple of hours. Came home & the tank was just starting to overflow with close to 4 gallons having been added to the system! Drained a bunch of water and checked the salinity which of course had dropped a couple of points in the two or so hours. The livestock seemed to know something was awry and were kind of hiding. In any case, once I drained the tank to a safe level, things got back to normal with no apparent ill effects. I also quickly mixed up a half gallon of concentrated salt water and added it in. I think the tank is large enough to forgive my boo boo. I kept the water I drained and refilled my ATO bottle with it. Hopefully this will get the salinity back to the original level in the course of 4 to 5 days. I'm about half way there and everything is fine, so I guess you could say, all of the fish in there are reasonably hardy. Even the inverts are doing their thing as if nothing happened. Colour me lucky.