Tissue loss pavona

[Matt W]

This lady has been losing tissue recently. Any thoughts? Lowered PO4 last week, but this likely started before that.

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[Chris A.]

What type of coral is that?

 

[Matt W]

I forget exactly, possibly encrusting green pavona. I got from Dong a couple years ago. Previously quite hardy, grew out this piece in 7g nano and has never shown stress until now.

 

[Chris A.]

Is there anything near it that could sting it?

 

[Matt W]

Is there anything near it that could sting it?

No, Only some zoas. The tissue is even receding in the area where it encrusted deep into the rock structure. I do have emerald crab but this coral has seen them a long time.

 

[dz6t]

Is water current vert strong at the part that loss tissue?


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[dz6t]

It is a pavona


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[Chris A.]

Was there bubble algae on those spots by any chance

 

[Matt W]

Is water current vert strong at the part that loss tissue?


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No - loss in less flow areas.

 

[Matt W]

Was there bubble algae on those spots by any chance

No

 

[Matt W]

Started inside and is moving towards the top

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[aresangel]

If it looks like it is spreading frag it up. Is t just lack of light? Looks like it either got crunched by something else or just over shadowed/died.


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[Chris A.]

Was there any of those aptasia near there or maybe nailed it with the wand by accident?

 

[Chris A.]

Nice zoas by the way

 

[Matt W]

Nice zoas by the way

Thanks, they grow really well. Wish I remember what they are. I may need to learn how to frag them off the rock soon. Haven't done much in tank fragging.

There hasn't been many aptasias by there. Kinda stumped here.

 

[jah-hoeva]

Could a fish have been picking at it?

 

[Matt W]

Could a fish have been picking at it?

Not sure. I have a Clown, six line wrasse, and a royal gramma. All in the tank for 1+ yr.

 

[JeanR]

I have the same encrusting green pavona and I would love to get rid of as it is overgrowing and killing its neighbors. If you figure out the secret to causing necrosis I would love to hear it!

 

[Matt W]

Alk is stable (8.0 - 8.2 over last mo), no light change, no significant flow change (increased flow by + 5%; - 2 mp10s at 40-50% in 40G),

Dosed PhosphateRx to reduce P from 0.4 ppm to 0.07 ppm 3 wks ago, but I believe necrosis started prior to this.

Recently dosed Fluconazole (at 4x dose) to treat bubble algae, and tissue loss may have slowed.

Unless loss seems to stop in the next day or two, I will likely pull rock off and dremel off the affected areas; dip in ReVive & ReefDip and place on a new rock. Does this seem like the correct approach?

I really like this coral. It pretty easy to grow and finally started encrusting across rock pieces looking mature. If this one doesn't make I may new a new colony from @JeanR or @dz6t

 

[Matt W]

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