Dying trachy

Abrfrie88

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Two of my trachys just randomly started to die earlier this week. I put a couple frag racks above them which partially shaded them and the next day I found one that was half melted with just skeleton left and the other had a bunch of white spots all over it. The white spots look similar to when a mushroom is stressed and releases the white stringy stuff.

I didn’t really think it was from being shaded for a day, but didn’t know what else would have caused it since they’ve been doing great in my system for over two months. There’s a another trachy that was right in between the two that’s still doing great.

Today I just noticed that a couple of my button scolys also have the white stringy stuff coming out from on top and around their base on the skeleton. I attached a couple pictures of the button scoly and trachy to show the white marks. I dipped the trachy in an iodine dip a couple days ago, but haven’t noticed any difference. If anything it just looks worked than it did before.

Alk - 9.2
Calcium - 450
Mg - 1500
Nitrate 15
Phosphate - 0.2

My phosphates used to be a lot higher like around 0.4-0.6 and I would control it with small amounts of phosphate reducing liquid, but I added a new skimmer last week and now it’s staying consistent between 0.1-0.2. All of the coral were doing great over the past few months while the phosphates were a lot higher so I don’t think it’s the phosphates that are causing it.

If anyone has any idea please let me know. Thanks!

20250829_161920_DEAED23D-4D0A-4EAA-83CA-6247DA67B6F2.png


20250829_161920_841D06BC-3B5D-452E-98AF-DE54A1C3509B.png
 

p1u5h13r4m24

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Those numbers look fine. I always try to lower phos very slowly. Maybe try to use GAC or do some water changes. Your numbers seem to be fine. Water changes might be your best bet. I
 

BonnieB

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Usually when white shows up on the flesh it’s the beginning stages of the expelling of symbiotic algae (zooxanthellae) that give it color, caused by stress of some sort, exposing its white skeleton. That might be your white stringy stuff and if I’m looking correctly some browning? It’s possible that it is a bacterial infection but you’d need the ReefSquad to ID that for you. Have you checked for pests like flat worms?
 

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