A few days ago I found a nudibranch on my tank and a lot of people from this forum told me to take him out of my tank because they are bad.
I put it on my refugium, because I dont want to kill him, but I would like to now if Its true that they are bad and why.
I put it on my refugium, because I dont want to kill him, but I would like to now if Its true that they are bad and why.