I got three female lyretail anthias last thursday. They are eating mysis soaked in vitachem three times a day like pigs. Saturday I noted a small white spot in the middle of the real fin of the largest one...it might have increased in size a little bit through sunday. It's very hard to get a good pic and I can't even attemp to get a pic for how active they are. It's larger than ick but I'm not sure what to do?