LOL!

Sorry to hear that. Weird coincidence....
Strange that anyone would tear down there tank amd clean it just because one fish died. Like everyone else I'd just be observant. Also test my water and do a water change maybe. Fish die for no reason sometimes (or so it seems.. maybe I kill them and don't realize!.). I think I'd try to avoid tearing it down at all costs either way just because the sheer amount of work....