My corals are losing tissue and turning white

[Henryn1]

The coral's skeleton is showing and it's turning white. My parameters look good. I have a torch and frogspawn but I'm not sure if it is stinging them.

 

[themagicman]

Have you checked the tank at night with a flashlight to see what's going on? It looks like things are a little too cose for comfort IMO and the corals are starting to compete for space. It happens all the time.

 

[Henryn1]

I don't see any sweeper tentacles at night. But when they expand during day, they make contact. Is it possible for them to sting?

 

[Nomdeguerre]

They need a good few inches at least between them maybe more downstream. IMO they are getting stung for sure.

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[aromano]

looks like coral TO coral warfare