Everything I'm reading matches up:/ I see fresh-dip and buying the quick quarantine stuff which I can do today but unfortunately there's no way for me to get a second tank other than that 10:/ the wrasse looks like he has powder all over him Hensel why I thought ich.
O.K.,, with this video, I'm inclined to drop the velvet diagnosis and say this is more likely either Neobenedenia flukes or late stage marine ich. Hyposalinity in a separate tank will treat both of those issues at once, so that would be the treatment of choice. Your logistics may not allow you to do that, if you can't pull all of the fish, your only real choice is to dose the tank with prazipro 3x, 8 days apart with good aeration. HOWEVER, that will only work if the issue is indeed Neobenedenia. If this is ich, the fish will continue to die.
Jay


