What's happening to my acro?

[Nikita1981]

I notice tissue loss at my most beautiful acro. It's random white spots that spread. Nothing changed in water chemistry, lighting or flow. I did not add any acros for months and no signs of stress on other acros, so I doubt it's aefw. I already lost a valida a couple of weeks ago the same way. White spots that get bigger what ends up in major tissue loss. The process is slow. Anybody have an idea?

Ca 420
Mg 1300
Kh 8.3
Po4 0.04
No3 5

I already did an icp test and nothing special showed up.

Any help appreciated. Thanks

 

[StatelineReefer]

I see closed zoas and a dead spot on the cats paw behind it... is there anything living on the rock nearby that may be irritating it? Coral Warfare?

 

[Nikita1981]

I don't think so. Pic is taken with a flashlight, lights were still off. The zoas open up every day and the dead spot on the cats paw is because that part is in complete shade. There is actually quite a bit of space between the corals although the pic does not show it. Thanks for the input though.

 

[bobby.w.hodges]

Possible aefw or other pest chewing on it. Can you dip it?

 

[Nikita1981]

Not without breaking it...I dealt with aefw in the past and I don't think these are bite marks. Will check tonight with a flashlight to be sure.

 

[Mellotang]

Def looks like flat worms

FYI Valida is the first one they will
Eat

For some Reason that tri color
Is their favorite