slugs worms and nudis

[new]

i know there are differences between these creatures,mostly minor from what litle reasearch i have done so far. currently have a flatworm in my tank that i saw once and have tentatively id'ed and am not real concerned about although watching closely. my LFS told me when we disscussed the worm that some of the nudis will poision a tank when they die. is this true and if so where can i find a list of safe ones?

 

[bang guy]

Very few Nudi's will poison the tank, and those that do would need to be in high numbers do do harm.
On the other hand, very very few nudi's will survive in an aquarium. They are all extremely specialized feeders and most will only eat one particular specie of sponge, and nothing else.

 

[new]

as always thanks bang