Big Habeeb wrote:

I think my surprise was more in general that ich was
an issue (not that I needed to keep a Q tank) - One of the solutions
I'd used with a decent amount of success in battling ich in the past
was adding a small amount of sea salt to my freshwater tanks....not
enough to even impact the spc gravity particularly, but it seemed to
do a good job of battling off the nasty ich...in most cases even more
so than the recommended chemicals (and I prefer not to use chemicals
anyway).

Freshwater ich and sal****er ich are two completely different animals
(literally). You will find many people who claim that sal****er ich is inherent
in all marine fish and can't be cured. These people will advise you to improve
your water quality, and the ich will go away.

I agree that it will. For about 2 weeks, until the next generation of the
parasite gets to the fish-sucking stage.

The only cure for marine ich (AK cryptocaryon) is copper sulphate.
Unfortunately, adding this to your reef tank will kill lots of stuff you really
need (for example, your live rock becomes dead rock), so you need a Q tank to
treat your fish. It also needs to be big enough to keep all your fish alive for
the month that it takes to allow the ich to die out in your main tank.

Better to quarantine your fish so that ich doesn't get into your tank in the
first place.

George Patterson
If you torture the data long enough, eventually it will confess
to anything.