I have kept some before. Once they get eating, they are easy... but all fish are like this and not helpful, right? 
These will not likely survive or eat in a sterile/barren QT tank. They might need some live food or adult brine shrimp at first. These got easier when mysis became available. Fish eggs were accepted too - capelin roe is available now for picky eaters. The last pair that I had got started in a 75g fuge with a whole lot of live rock, macro, mysid shrimp and pods. They were fat, but not eating any offered foods until I put another fish in there to show them how to come up to the top and gobble up mysis and stuff.
Chain of custody will matter a lot, but it is very hard to know where fish come from anymore. I got my pair from a Hawaii Wholesaler, likely out of the Marshalls, and they were always kept at reef salinity and never treated with copper or anything. I don't know you would even know anymore, but I would avoid typical LA wholesaler with their 1.018 tanks and medications and stuff. Some will know how to handle these, so ask around. I would treat them like sensitive butterfly fish or wrasses which need special handling.
I do think that pairs help.
I got rid of them when I moved and regret it.
These will not likely survive or eat in a sterile/barren QT tank. They might need some live food or adult brine shrimp at first. These got easier when mysis became available. Fish eggs were accepted too - capelin roe is available now for picky eaters. The last pair that I had got started in a 75g fuge with a whole lot of live rock, macro, mysid shrimp and pods. They were fat, but not eating any offered foods until I put another fish in there to show them how to come up to the top and gobble up mysis and stuff.Chain of custody will matter a lot, but it is very hard to know where fish come from anymore. I got my pair from a Hawaii Wholesaler, likely out of the Marshalls, and they were always kept at reef salinity and never treated with copper or anything. I don't know you would even know anymore, but I would avoid typical LA wholesaler with their 1.018 tanks and medications and stuff. Some will know how to handle these, so ask around. I would treat them like sensitive butterfly fish or wrasses which need special handling.
I do think that pairs help.
I got rid of them when I moved and regret it.
