sounds like your vodka increase and skimmer being off caused a bacterial bloom. if temp rose at all, then that would speed up the process. once bacteria bloomed your water went anaerobic. the least efficient breathers died, this would usually be corals (but yours are ok?), and inverts like shrimp and crabs. once they died the bacteria had more to feed on, so bloomed more, and the water became increasingly toxic with all dying material. this caused the rest to die. fish and anything else left.
i am so sorry this happened, but i too have had bad experiences with bacterial blooms, and this sounds exactly like what this is. if this ever happens again, or happens to anyone else, you need to get AS MUCH AIR AS POSSIBLE in the water. skimmers on, air pumps on, any powerheads with air ports open. the water will start to clear up and the livestock will be able to breath throughout the process.
