Do yo
Do you still have these idols?That's a tough call.
I have two idols that were acquired in 2015 from A&M Aquatics. They are in a huge tank, and have been doing very well - they seemed paired up. IIRC, they were given 30+ days of Coppersafe and 3x prazi. However, they were quarantined in a 1200 gallon, well established Q tank.
Idols are prone to ich, but it is easy to see on their black stripes.
The dorsal filaments grow back quickly.
I guess, if pressed, I would say two weeks of Coppersafe, and moving the fish out while still in copper, would be better than a two week purely observational quarantine.
Jay