Yesterday, I removed the Activated Carbon, switched off the Skimmer, and applied the medication. The medication was enough for 500l, which is a slight underdose, but I'd rather under, than overdose!
I had a look at the tank this morning and I couldn't see any bodies. However, the lights were not on, and most of the fish were still sleeping, but no dead bodies stuck to the circulation pump intakes was a good sign !
I did have one casualty. I managed to catch three of the most badly affected fish (2 x Blue Chromis, 1 x Female Anthia) and put them in my emergency 40l hospital tank, but overnight the Anthia jumped. Can't do much about that.
This whole episode has made me think a bit about our tanks, and the advice you read/receive. First off, nearly everyone says, "put your fish in a hospital/quarantine tank", but how practical is this in reality? If you have a Nano, then this is possible, but when it's something like the S-650, with 20+ to 30+ fish, and the scape has been designed by yourself to include caves, hiding places, sleeping places, overhangs and don't forget the corals, then you can forget it. I did purchase a fish trap, but after catching one fish in five hours, I've decided that this isn't really an option. The reality is that if you want to catch all your fish, you have to strip down your tank, rock, corals and all. What would be ideal is if one of the fish/chemical companies produce a drug that sends the fish to sleep (almost like an anesthetic), but doesn't kill them, so you can then just pick them out of the tank easily !
The problem is that most of the medication to treat the various infections, is not good for the reef tank. This is the first time I've had to deal with a problem like this, but I have to ask everyone, are you prepared for something similar? Please, I don't wish this on anyone else, but just think about what you would do with all the fish in your tank. How big a hospital tank would you need? I think we all have spare heaters and circulation pumps hanging around, so that's no problem.
I'd also recommend that the link produced by Nanoreefing4fun four posts before this one should be bookmarked. It is an excellent link.
Bad things happen so fast it's frightening. I can't believe how quickly things went from hhhmmmm to aagghh !
So it's wait and see. In the meantime I'm preparing as much water as I can for a 30% water change in the next couple of days. Once again, this causes problems as I had to use one of my water containers as the hospital tank, so my water storage capacity is reduced just when I need it to be at it's maximum !