Brown stuff on candy, cane, coral

[OneMerissa]

Can anyone ID what is on my candy cane coral?

 

[STLCorals]

It looks like they are receding and that is algae on fresh skeleton

 

[OneMerissa]

It looks like they are receding and that is algae on fresh skeleton

How long does it take them to die? They were big and fluffy about three days ago. I am currently treating my tank with Flux Rx

 

[gbroadbridge]

How long does it take them to die? They were big and fluffy about three days ago. I am currently treating my tank with Flux Rx

Flux RX does not affect coral. What are you trying to treat?

 

[OneMerissa]

Flux RX does not affect coral. What are you trying to treat?

GHA. I’m at 14 days tomorrow so I’ll do a 20% change and add back my chemipure blue.

 

[Blake423]

how's your nutrient level?