This is my first time owning and quarantining wrasse also (a carpenter flasher and a pintail fairy wrasse). After much research and asking many questions this is what I decided to do. I transitioned 2 black balloon Mollies to saltwater and have them in the same qt tank as my wrasse. This is because of the wrasse being able to carry ich and velvet and not show either disease because of the thick mucus layer that wrasse have. The mollies, being from fresh water, have no immunities to marine diseases and being black will show the disease easily. In theory they will "hit" first. I then slowly raised my copper concentration up to 2.2 ppm of Copper Power over 7 days. The fish are in day 9 of this copper level, as of today, and are not showing signs of stress so far. After 15 days, just to give them 1 extra day to be safe, I will do 3 large water changes ( I don't change 100%) while running Cuprasorb. Once my copper level is at or near zero ppm I plan on removing the Cuprasorb and dosing 2 rounds of General Cure (not sure if thats available in Canada since it does contain a lower dose of Prazi) 5 days apart and changing 25% of the water after each round. On a side note, it's my understanding that wrasse are notorious for having flukes, thus the reason for dosing General Cure in the water column. If all goes well I will give them another week in qt, then off to the main display tank. I did notice white stringy poo from my flasher wrasse so the fish are also being fed General Cure bound by Focus to their food for the eighth day now. This will continue for 6 more days. The poo has returned to normal. I should also note that I decided to use the mollies because I don't have another non medicated tank to transfer the fish to after 14 days in therapeutic copper levels. I don't know if this is a good way or not, but it's the way I'm trying to quarantine wrasse. I hope this helps you and good luck.
