HELP! Neon Green Tree Coral going black

Sacha

New Member
View attachment 49069 Hi there

Our neon green tree coral hasn’t opened up in about 4 days and is starting to go black on the tips of its branches.
Any idea what it might be? Is it dying?
Please help!

Thank you
 

Uncle99

Well-Known Member
What are your parameters, especially Alk?

What do you maintain iodide at?

Have there been any recent changes?
 

Sacha

New Member
What are your parameters, especially Alk?

What do you maintain iodide at?

Have there been any recent changes?

PH 8
Alkalinity 124
Salinity 1.024
Nitrate 5.0
Nitrite 0
Ammonia 0
Calcium 438

There has been no recent changes.
The corals get fed with nano reef roids every 2 to 3 days.
Last water change was 2 weeks ago.
Every other coral and fish is happy except this one
 

Uncle99

Well-Known Member
Is your 124 Alk in ppm, therefore 6.944 DKH? Seems a bit low but if this is what you normally run then OK.

What's phosphate?

Others seems good.

Leathers hate any flux especially ALK, are your numbers stable?

If so, could someone else be bugging him via sting or chemical?

If in doubt for chemical run carbon to be sure.
 

Sacha

New Member
Phosphate is also 0

Numbers are stable although this is the longest we have gone without a water change. (About 3 weeks)

No other corals can be stinging him, he’s not close to any of them. Unsure about chemical. Would chemical affect my other corals too though? They all seem fine.

Any idea what the black marks on it are? Is it dying flesh?
 

Uncle99

Well-Known Member
Phosphate should not be zero, corals use both nitrate and phosphate as food.

Nitrate in Reef tanks 2-5ppm and phosphate 0.03-0.07 (max of .1)

Otherwise corals will die from starvation slowly over time

Leathers have a toxin, but it’s only used as a defence.

Need a pic to see what you mean
 
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