I have read this. However regardless of whatever method I was going to use, what would kill a fish in half a day? That's what I'm trying to figure out.
did you check the salinity of the bag the wrasse was in?
If it was far lower then this could cause osmotic shock and kill the fish.
The QT tank should be made up to match the salinity in the bag. This is one of the advantages of using a QT tank. Then you can bring it up slowly over time before the fish finishes QT. This is even less stressful then dripping since it can be done over a period of days/weeks instead of hours while the fish remains stressed during the drip.
I have done TTM on all my fish and many wrasse. I buy a dry bag of new sand and add a few handfuls of fresh stuff every time they move to a new tank/bucket. I then rinse the old sand to dry out in a tub completely over a few weeks. That way I am not buying new bags all the time. Just re-using the same stuff. I have plenty to rotate to be sure that it fully dry between uses.
I also mostly use plastic decorations instead of PVC. It is a plastic fake grey log and a fake grey gator head. The fish like these more than PVC as they are not neon white and textured and look like rocks/natural to them. Since they are plastic aquarium décor, they are still easy to clean and dry between transfers.
This is a bucket with two radiant wrasses going through TTM. I use a dim/less harsh light thats greenish blue but ambient lighting works great too if the room has enough. The air pump was turned off in this video as they were eating. I only use heaters for TTM when it's cold out. In summer, the house stays appropriate temps and I consider them just another potential point of failure so only use them when weather calls for it.
These fish have been in my DT for awhile now and are spawning
The biggest issue with QT is that people sort of 'half do' them. They still need to be as stress free as possible. A lot of times this means sand when appropriate, appropriate matched parameters, and appropriate hiding places (PVC is not best practice IMO). I use large tubs for larger fish. They go into a CYCLED spacious tank for observation after this. I would never keep a fish in a bucket or 10g tank for long periods.
Please feed lightly EXCEPT the feeding you do on the day they will get transferred. I fed sort of heavy in this video as this was transfer day so no risk of fouling the water.
