white coating

Hi everyone, A few days ago, I noticed that my Copperband Butterflyfish is covered in kind of strange looking „white coating”, as you can see in the attached photos. I’ve never seen anything like this with any of my fish before. My Moorish Idol is currently dealing with ich, but I don’t think...

Hello…I’ve seen several posts about Life Rock but haven’t found an answer to my question. I've started to get some hair algae (I’ve been over feeding ) so I’m dealing with that, but I need help identifying this white coating on the highest points of my Life Rock. None of the inhabitants seem to...