:wink: Thank you for all your answers. I think the mystery will stuck again! :lol: Anyway, if this phenomenon is real, it is quite amazing! I hope we will have a clarification one day, because it is quite fascinating for me to imagine such things possible! Thank you again for your kindness, and see ...

:D First of all, as I am new here, I wish to say hello to everybody :) I have a strange question to ask you: I heard about some corydoras sterbai who could secrete a toxine when they consider they are too many in a tank... :shock: I never heard about it before, and I really would like to know if it ...