I have a friend that decided he needed a Mandarin Goby in a 10 gallon tank. Of course, I told him that it was too small of a tank, but he bought it anyway and now he wants to give it to me and I already have one Mandarin Goby in a 135 gallon tank. Is there any problem with having two of them in the tank as far as territory and space? I have 2 Percula's and a flame angel in the tank also. My pod population is great and they have plenty of breeding spots and I know that they eat a lot of pods. Do you think that there will be a problem with having two Mandarin Gobies in my tank?