Does the copper level not change with all of that rock in it? I understand that calcareous rocks absorb copper (and in turn might cause problems from leaching it).
Curious what your QT procedure is for the wrasses. I'd like to lean how to do it well for sand sleepers using a tank with rock and sand.
Initially it seemed to slightly drop, but nothing crazy. Cupramine doesn't seem to leach into the rock, at least in my experience. Sand in this tank is silica sand (pool filter sand), so just doesn't really absorb anything.
When all these fish move to the 100 gallon, this rock will move with them. I'll run carbon for a few days, and add some test corals to see how they do. So long as they don't wither and die overnight, I'll move more corals, including Acroporas over. I've had no issues doing so in the past, and don't expect any now.
My wrasses all get at least 14 days at 1.009 SG, 30 days of cupramine at 0.5mg/L, 3 treatments of Prazi-Pro at 7 day intervals, and once daily dosing of ruby reef rally pro for 7 days (the first 7 days). All medications are used concurrently. I also often use metroplex, fenbendazole, and/or levamisole for my wrasses, especially if they seem like they are losing weight while eating well. All new fish usually get a formalin bath as well before entering quarantine, though I occasionally skip if I run out of formalin.
These treatments are often used simultaneously, and I don't usually have any issues doing so. Same quarantine regiment I use for (almost) all my fish. I do dose Microbacter7 daily to keep up with any potential ammonia spikes from heavy feeding, heavy stocking, and medicating the system causing bacterial imbalances.