The naso tang died yesterday morning.
I've learned Formalin or the full 37% formaldehyde is controlled in Canada and you can't but it retail. I was able to find Ich-X that a different LFS had yesterday afternoon. It has some version of formaldehyde in it, 3%? I followed the bottle exactly to the letter for a 30 min bath first in 1 gallon of water. The 3 fish (sailfin, wrase and hippo tang) all seemed to handle it ok. I then did a 20% water change as recommended and with the 20% new water in (same salinity and temp) I added the appropriate amount of Ich-X for the aquarium. After the bath and going back in the newly treated tank they seemed to do be doing ok. I tried feeding them and the wrasse ate a bit and the hippo but the sailfin didn't touch any. I put them to bed with hopes they would be ok.
This morning the hippo tang was dead, which surprised me, I thought it was doing better than the sailfin. The sailfin is getting worse now too. It is not swimming normal, lays on its side, heavy breathing. Not sure what else I can do. The wrasse seems normal. I just put in tad of food this am and the wrasse picked at a few pieces. At this point I assume the sailfin is going to die leaving just the bluestreak cleaner wrasse.
When I was showing the new LFS pics of the fish yesterday he mentioned the wrasse typically won't get parasites, ich, velvet, brook etc. Is this true? Assuming nature is going to take its course and the sailfin will die I now have a cleaner wrasse in a infected QT. What would be the best plan to try and save it? Dump all water, disinfect the QT? Give wrasse a Ich-X or FW dip? QT water is still hypo at 1.009 - 77degC.
thanks again for any advice.

I've learned Formalin or the full 37% formaldehyde is controlled in Canada and you can't but it retail. I was able to find Ich-X that a different LFS had yesterday afternoon. It has some version of formaldehyde in it, 3%? I followed the bottle exactly to the letter for a 30 min bath first in 1 gallon of water. The 3 fish (sailfin, wrase and hippo tang) all seemed to handle it ok. I then did a 20% water change as recommended and with the 20% new water in (same salinity and temp) I added the appropriate amount of Ich-X for the aquarium. After the bath and going back in the newly treated tank they seemed to do be doing ok. I tried feeding them and the wrasse ate a bit and the hippo but the sailfin didn't touch any. I put them to bed with hopes they would be ok.
This morning the hippo tang was dead, which surprised me, I thought it was doing better than the sailfin. The sailfin is getting worse now too. It is not swimming normal, lays on its side, heavy breathing. Not sure what else I can do. The wrasse seems normal. I just put in tad of food this am and the wrasse picked at a few pieces. At this point I assume the sailfin is going to die leaving just the bluestreak cleaner wrasse.
When I was showing the new LFS pics of the fish yesterday he mentioned the wrasse typically won't get parasites, ich, velvet, brook etc. Is this true? Assuming nature is going to take its course and the sailfin will die I now have a cleaner wrasse in a infected QT. What would be the best plan to try and save it? Dump all water, disinfect the QT? Give wrasse a Ich-X or FW dip? QT water is still hypo at 1.009 - 77degC.
thanks again for any advice.