Hey guys! I have been researching the Purple Firefish goby and I am very interested to put one i my tank. I have heard they can't contract a disease or they are very hard to get sick. Would I still need to quarantine it? I am also very interested in getting a Coral Beauty Angelfish. With them I heard they are very easy to contract a disease and need a UV sterilizer. Is that true and how much are they? Thanks!