Montipora, is this RTN?

[ReefK]

Montipora has started loosing tissue and it happened overnight. is this RTN?

What can I do to treat/ recover. Have given a 10 minute iodine dip.

Parameters are
Alk 8.0,
Cal 420,
Mag 1350,
Phosphate 0,
Salinity 1.025,
PH 8.0.

There has been no changes made and parameter are constant.

 

[vhuang168]

Did you dip and inspect for pests before placing in the tank. I would look for monti eating nudibranchs!


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[Myka]

Yes, it is RTN if it happened overnight/quickly. It looks like the patches are in an area that is shadowed. Also, the rocks in the background are very white - is this tank brand new?

 

[ReefK]

Tank is matured, I put in the new rock to move the coral a bit low from light. If the patches are in the shadow area should I move it back up?