yes don't remove it. we always lower the light levels in tank transfers, that's why we have no bleaching events, so with these lights being the same as before that's not an acclimation surprise. Don't judge anything from what toadstools do: they close up sometimes for days or weeks to shed tunic material, then are out strong. don't throw it out until it falls off the base; it easily might come back. move it down a little if it's high up: bleach burns during transfers are a real risk, that's why we stopped using full light in the transfer thread.
in no way can trace ammonia harm anything in your system, for reasons we've discussed completely. the rest of this thread will be critics painting fear and testing reaction into your reefing habits, preventing you from understanding updated cycling science for the likely entirety of your reefing career, they're bent on it apparently, but any tank pic you post will be that of a normal-running reef. if you had bad water, none of those anemones would be open.