Just got this aussie acan lord acclimated it perfectly and it stsrted out nice and fluffy (in pic below) and then i noticed two days later its kinda unhappy and this necrosis lookin number is happenin on it! I have seen my tangs pick at it a couple times but not too much.... Does anybody have an idea of what could be the cause??
healthy pic and unhealthy pic .....ANY FEEDBACK APPRECIATED!!


