rtn with green at base thoughts

[Chicago]

ok.. most of my sps are doing great .. a have one or two which are receding from the base and going green.. your thoughts.. I have mine but would like to hear from the community

 

[epicurus84]

This isn't RTN, if it got time to get some algea on it its STN. RTN happens almost over night over day (coral will loose its tissue in 24-48 hours).

I would frag of while you can, remove the base and look for flatworms.

 

[Piper27]

Are you using a carbon source? I had a bad experience where my corals would turn green on parts of them just before they rtned, or showed stn. I believe the vinegar dosing I was doing started a bacterial infection, even though I was using it at half the recommended or average dose. I lost quite a few corals. They looked beautiful one day and the next mourning They were half dead with tissue peeling and receeding.

 

[Piper27]

Doesn't look like flatforms either, but doesn't mean they aren't there. I would say frag it, if it continues to show signs of recession and if you are carbon dosing be careful

 

[Tweaked]

I see brown corals and algae in the pic. What's the PO4 at?

 

[sahin]

OK, there are multiple areas of tissue loss. It can be classified as slow tissue necrosis, but regardless, you need to get to the bottom of why this is happening.

Can you list your equipment and parameter stats? Also let us know all forms of chemical filtration/dosing etc you are currently utilising.

Without knowing the above details all we can say for sure is that you have tissue loss on your acro which you already know.

Also let us know which other SPS have tissue loss? ie Just Acros or Monti's, Stylos etc?

 

[jda]

Parameters and then Pests. I know that nearly nobody thinks that they have pests, but then later find out that they do - seriously check this with a vengeance.

 

[Chicago]

Salinity 1.026 PH 8.35 phosphate and nitrate zero
Many other Corals and Frags are all thriving
Dosing two part and run a kalkWasser reactor
Also run a bio reactor
Interesting thing is skeletons are turning green from algae within a day after STn
Photograph is bad. Coral was is a dark purple
Humils. SOS us another one I have which is showing the same issue
Thoughts are kaljwasser,
bacteria from the bioreactor or swinging salinity
Swing in salinity is really only from 1.0252 1.024 back up to 1.026 over maybe a couple days

 

[Chicago]

What last thing to add is Mike alkalinity was kind of low 7.844

 

[bogg]

Looks to me like the same algae that's on the live rock