unless your system is small and you want to set up a breeding tank for them nudis imo are a waste of time and money. either lemon juice the ones you can or use kalk or buy a matted filefish, their hardy and eat frozen or flake/pekllet, they can nip at some corals mainly lps and zoanthids but theres ones that dont touch a thing.in a matter of a couple weeks they can clean your whole tank up and then afterwards they make a unique addition to your system
peppermints will work most of the time but theres strength in numbers so you need a few of them and they do a better job in tanks that theres not an overabundance of available food.....why go for kraft dinner when steak is served 3 times a day right
butterflys are hard to keep
electricity is always fun if your not dealing with plague proportions