Acro Base - RTN??

[LinkinPark]

Bought this piece of acro @ 5 weeks ago. It was purple turned to brown. It is sitting @ 10 inches directly under 250w 10kk, waiting for the colour to return.

Just done my routine forthnightly 50% water change on Sat.

This morning discovered the two highlighted areas (at the base and shielded from light) were white. Did not see tissue peeling and did not know when this happen.

1) Bleached or rtn?

2) should I frag?

3) or should I leave it alone?

Water para:

Ca 400-420ppm

Alk 9-10dkh

Temp 25-27

using rowaphos, carbon and EV-120 skimmer

[LinkinPark]

Additional info

3 ft tank with LPS and some SPS, 2 mandarin and 1 algae-eating goby. No soft coral.

Water flow: 2 return pumps, 1 Tunze 6060 and one PH

[mv3i]

looks like ... keep an eye on it n if it spread .... time to frag ... happen to 2 of my colonies but after fragging ... it juz took off ....

Good Luck !

[Morgan]

Keep an eye on the patches.....and see whether the patches grow bigger.

It does not look like RTN to me......cos if rtn you lose it very fast.

If it spread....like what mv3i say....time to frag.

[Achilles Tang]

Peeling? Flapping?

It could be STN, slow tissue necrosis - a form of tissue recession?

[Dispar_Anthias]

Peeling? Flapping?

It could be STN, slow tissue necrosis - a form of tissue recession?

That sound equally bad

[Joe_P]

Applying a layer of epoxy onto the affected area up to healthy flesh works for me.... the other alternative is to frag it.....

[IanJ]

I have also used super glue to stop tissue recession from the base