Just got a new addition to my one year old 12g nano.....a very nice little (4" diameter) Sebae. I have 2 black false percs who have hosted the output nozzle on the nano (seriously), and so far don't seem to care about the new arrival. From the research I have done, it seems like they may never decide to host the Sebae. Over the past few days i have noticed my hermit crabs showing the most interest, some of them even seem to be bringing the Sebae food scraps. Does anyone know if the crabs are immune to the sting, or are they just clueless? Any and all info about experiences with Sebaes would be greatly appreciated.