Acropora RTN

[alp5747]

I hope someone could help me out

I Got a couple maricultured acropora 1 week ago.

After 1 day after arriving I only had 1 doa of about 50 corals

But after that I have seen acros RTN every other day

Now about 6 out of 50 corals have RTN the past 4-5 days.

I am wondering if this is normal that some maricultured acropora RTN
Most acros have great day time and night time polyp extension.

Could it be a pathogenic bacteria in the water or is this normal death of maricultured

Parameters are

Alkalinity 8,5 dkh stable with Alkatronic
Magnesium 1350 ppm
Calcium 410

Nitrate 15-20
Phosphate 0,15

Nutrients are a little high I am wondering if that could be the cause.

Running t5 blue plus
And radion xr30

The tank is a 100 gallon quarantine.

What would you recommend I do I could move the acros to my main system with better nutrients. But I haven’t dipped for pests.

 

[MoshJosh]

I like to keep my N lower than that for acros, but I know people have kept them in tanks with higher N (as have I when I screw up my nutrients haha). . . Otherwise your parameters look good (assuming temp and salinity are fine?)

Honestly I can't help you much with what the cause might be, but I will say that, IME, fragging off the living pieces and gluing them to new frag plugs may save what is left of the coral.

As far as dipping and moving, it is a risk for sure. Dipping the new corals could further stress them and cause more harm than good, but if they die in quarantine it doesn't really matter. I will let others with more knowledge and experience chime in, but I think it will be weighing the risk VS benefit of leaving them alone and seeing how they do VS dipping them and moving to the established tank (comes with its own risks as well). Keep in mind that assuming moving them to the established tank is the fix assumes that the other tank is this issue, and if that is not the issue, well your back at square one. . .

Also, could be a little "shock", I have definitly had groups of acros come in where some seemed to instantly melt while their neighbors thrived. . . That said I have never had any order as large as 50 frags.

Sorry for my rambling but BUMP and hopefully others chime in.

 

[alp5747]

I like to keep my N lower than that for acros, but I know people have kept them in tanks with higher N (as have I when I screw up my nutrients haha). . . Otherwise your parameters look good (assuming temp and salinity are fine?)

Honestly I can't help you much with what the cause might be, but I will say that, IME, fragging off the living pieces and gluing them to new frag plugs may save what is left of the coral.

As far as dipping and moving, it is a risk for sure. Dipping the new corals could further stress them and cause more harm than good, but if they die in quarantine it doesn't really matter. I will let others with more knowledge and experience chime in, but I think it will be weighing the risk VS benefit of leaving them alone and seeing how they do VS dipping them and moving to the established tank (comes with its own risks as well). Keep in mind that assuming moving them to the established tank is the fix assumes that the other tank is this issue, and if that is not the issue, well your back at square one. . .

Also, could be a little "shock", I have definitly had groups of acros come in where some seemed to instantly melt while their neighbors thrived. . . That said I have never had any order as large as 50 frags.

Sorry for my rambling but BUMP and hopefully others chime in.

Thanks for the response

Obviously the quarantine system is not very stable or at least biologically as the live rock is only 3 weeks old so there is no bacteria introduced to the system except the bacteria that was on the maricultured coral. In terms of chemical stability of parameters they are very stable with Alkatronic with alk swinging by no more than 0,1 Dkh per day.


Either way I have to dip the corals for pests. As that’s why I keep them in the quarantine system and I figured if anything is on the coral I might as well dip them 2 times per week in my main system as I don’t have a lot of acropora I can take the acros I have and also dip them 2 times per week.

Main system nutrients are a lot better at:

10 ppm nitrate
0,04 ppm phosphate

 

[Uncle99]

The QT system may not be ready in terms of the diversity needed to sustain some corals, especially SPS.

I would dip them, inspect with magnifying glass, and put them in the mature system.

They are likely starving.

 

[Reefering1]

Acropora from the ocean are used to nsw parameters. Your waste products are very high compared to that. This is likely the problem. Do acros that have been established in captivity suffer the same fate?