Help, sick fish maybe?

[Seafan]

Sorry to hear about your losses and trouble with the tank. Just curious, what was your salinity at before you increased it? Unless it was a really huge increase from what you originally had it should not have been the change in salinity. I had monos and gsp's for the longest time a while back and I took them from freshwater, (which the store I bought them at had them in) to reef in a matter of a couple of weeks with absolutely no ill effects. There is more of a chance of hurting the fish if it is a decrease in salinity too quickly. It really sounds like a water issue to me with lack of oxygen, I would definately buy your own test kits, as when a petstore tests your water, if it's one of the chain stores that is, They are pretty inaccurate. Remember a tank can look clean even with huge amounts of ammonia, nitrite and nitrate, and these fish seem especially sensitive to these. Have you been testing and changing water out after each loss, as this could potentially create a spike in parameters as well.