Originally Posted by Greenchrom
The best way to rid yourself of a nudibranch is to invest in a fish that eats those nudibranchs. Or simply wait till your zoos are gone. Nudibranchs can only live for up to 3 weeks without eating. Then they die. Nudibranchs are also 99% of the time specialized eaters, eating 1 specific species of lower phylogenic invertebrate. So if your zoos are gone, they will be as well. A larger fish like a puffer or a wrasse will eat many invertebrates and be able to cope with the toxins the nudibranchs sequester from your zoos. My advice is to do some research on water chemistry and nudibranchs first and find out what you can about them before dipping everything you have in iodine.
Iodine dip is the best way to rid zoo eating nudibranch!!! No fish will eat the nudibranch since they're toxic, they'll release nasty taste if a fish tries to eat'em, either that or they'll poison the fish. We have done much research on a type of fish that would eat the nudibranch and from every site we have searched, nothing eats'em. All of them have suggested iodine dip to rid the pest. If you have too many nudibranch that dies within your tank, they'll also release toxins. :happyfish