Acropora tissue lost

vincephuket · Oct 23, 2020

Hi, I received a blue acro frag this morning, glued to a plug and put in my tank. It was fine, polyps out. In two-three hours lost all the tissue.

All the other sps are fine. Water parameters are good except for PO4 which are too low (bottomed at 0.00).

What could have happened? Stress? Strong light (I did not acclimate for the light, it is something I normally don t do).

Would love to hear your opinions...

Daddy-o · Oct 23, 2020

Stress from dipping, shipping, not water acclimating, lighting, too much flow?

Hermie · Oct 23, 2020

are you sure it's not just bleached, and the tissue is not completely gone? I've had corals that I thought were dead but it turns out I was wrong, they were just bleached and they came back over time.

vincephuket · Oct 23, 2020

NotASpammerDude said:
are you sure it's not just bleached, and the tissue is not completely gone? I've had corals that I thought were dead but it turns out I was wrong, they were just bleached and they came back over time.

vincephuket · Oct 23, 2020

Daddy-o said:
Stress from dipping, shipping, not water acclimating, lighting, too much flow?

Mmm probably dipping and lighting... flow I think it is fine.

Hincapiej4 · Oct 23, 2020

It's not dead, I think. Any polyps? If you look at my thread, you'll see a bleached acro, but not dead and it's coming back.

Dead or not dead?

I forget the name of this coral. But I got two different ones in this past weekend (I can't remember the name for either). One is doing great and immediately had PE. The other looks white in person, has PE, no algae..yet. but..in pictures it has a beautiful color. Now, it could just be the...

www.reef2reef.com

Macdaddynick1 · Oct 23, 2020

vincephuket said:
Hi, I received a blue acro frag this morning, glued to a plug and put in my tank. It was fine, polyps out. In two-three hours lost all the tissue.

All the other sps are fine. Water parameters are good except for PO4 which are too low (bottomed at 0.00).

What could have happened? Stress? Strong light (I did not acclimate for the light, it is something I normally don t do).

Would love to hear your opinions...

From your post it looks like. Strong light 0 po4 = RTN. Perhaps there are other issues, but if your po4 is truly bottomed out at 0 that usually does it. Specifically I’ve noticed the issues with darker corals like torts or Granulosa that don’t react well to insufficient po4 IME. What are your other parameters while we’re at it? No3 and alk/ ph?

Hincapiej4 · Oct 23, 2020

Actually, I got a better look, yea it's RTNing. Cut some off before it completely dies. You might save some...

nereefpat · Oct 23, 2020

What are your actual parameters?

Some folks will argue that 0 phosphate is an issue, but I don't see how 0 phosphate can cause that in a couple hours.

Hincapiej4 · Oct 23, 2020

nereefpat said:
What are your actual parameters?

Some folks will argue that 0 phosphate is an issue, but I don't see how 0 phosphate can cause that in a couple hours.

I think it's more the shock going from a tank with normal or higher PHOS and high light, to high AND different lights with NO phos

Hincapiej4 · Oct 23, 2020

That said, 0 PHOS coral will starve.

vpoiu1263 · Oct 23, 2020

Hello everyone, mine phosphate is also tested 0 by Hanna check for a long time. So far the acropora are mostly good.
But how to increase a little phosphate by adding something?
Could any one the got any answer for increasing a little phosphate and nitrate?

Daddy-o · Oct 23, 2020

vpoiu1263 said:
Hello everyone, mine phosphate is also tested 0 by Hanna check for a long time. So far the acropora are mostly good.
But how to increase a little phosphate by adding something?
Could any one the got any answer for increasing a little phosphate and nitrate?

feed more

vincephuket · Oct 23, 2020

I doubt the lack of PO4 can cause a RTN. And the other acros are totally fine...
My parameters

NH3 < 0.15
NO2 0
NO3 10-15 ppm
KH 8
PH 8.1
Sal 35
Ca 420
Mg 1320
PO4 0.00

DMG Reef · Oct 23, 2020

If you received the frag this morning, I wouldn't blame your parameters at all. I'd guess 100% shipping stress. Maybe got too cold or even worse, too hot. The only time I've lost frags on the same day I received them was when the seller didn't use a cold
pack while the temperature was 100 degrees.

I received a frag on Wednesday from a large vendor here on R2R. No heat pack, bag was cold. The frag has no color but is alive for now. I've got it on the sand bed until it recovers.

Hincapiej4 · Oct 23, 2020

It's not your parameters, it's the shock that did it. And 0 po4 will kill corals

vincephuket · Oct 24, 2020

Hincapiej4 said:
It's not your parameters, it's the shock that did it. And 0 po4 will kill corals

What products would you use to dose phosphurus, except Neophos which is not available here in Thailand?
Or maybe I will just take the gfo out for a couple of weeks...

Hincapiej4 · Oct 24, 2020

vincephuket said:
What products would you use to dose phosphurus, except Neophos which is not available here in Thailand?
Or maybe I will just take the gfo out for a couple of weeks...

Feed more. Maybe shut off the gfo