SPS bleach from base up

[uhupong]

Can someone please tell me what are possible causes to have SPS 'bleach' from base up?

Thank you

 

[jackson6745]

It's RTNing from the base up (it's dying). Search Slow Tissue necrosis (STN) and Rapid Tissue necrosis (RTN) When SPS bleach they are still alive.
IME causes are usually high nutrient related coupled with low alk. No one really knows for sure though :)

 

[kacrocorals581]

Is dying. you can try cutting above were its loosing flesh and dip in a iodine solution and see if you can save some of it

 

[uhupong]

Im looking at what could making it happen.

 

[Rob&Gab]

try and clip it or glue around the white part. mainly clip it to try to stop the spreading.

 

[MBG75]

Is it a maricultured or wild piece? If so, It can happen even if parameters are good.

 

[Dashiki]

What are your levels?

I had a colony stn while I was on vacation because a fish died and my nitrates spiked.

Any alk swings recently. Think back a month before it started it doesn't always happen immediately after the cause of the stress.

 

[64Ivy]

I've had Acropora stn from the bottom up when I elevated my alkalinity to upwards of 11 dKH. Once I brought it back down to 8-9, the die-off slowed, then stopped.

 

[uhupong]

My tank is 120G mostly with SPS

Alk 10 by doser
CA 460 by doser
MG 1450 by hand
Salinity 1.025. -Calibrayed
Phospate 0.05-0.1 -Hanna
No3 ~0 -Redsea
PH 7.85-8.05. - prob + salifert
Red sea NOPOX - on demand
Red ses reef energy - twice a week


Light 2 Maxspect razor
Flow MP40 +WP40
BRS reactor GFO + Activated Carbon
Skimmer SR-2000 bubble blaster
30G sump
Osmolator ATO
5 stage RODI read 000
Apex controller

 

[uhupong]

try and clip it or glue around the white part. mainly clip it to try to stop the spreading.

Cant clip, it happens on many base of colony.

 

[MBG75]

Pretty sure nopox is a carbon source. That coupled with high alk could be an issue

 

[Dan_k]

Alk at 10 is really high if you ask me I try to keep mine at a constant 8

 

[Dashiki]

Phosphates at .05+ is high for sps that can be a cause.

With no measurable nitrates and high po4 alk over 9 can be an issue. I'd try gfo as my first attempt. Then try lowering the alk.

 

[Dan1789]

I didn't think .05 was high, but I guess it depends on a bunch of other factors.

 

[jedimasterben]

Elevated phosphate would really only cause issues with coloration, and 0.05ppm isn't nearly enough to worry about that happening.

 

[kuansreef]

I have had the same issue for 3 years. If all your water parameters are normal and you have a chiller and cal. reactor, it's your ph swings due to lack of oxygen in your house. Hook up a tubing to your skimmer air intake from outside so it get air straight from outdoor. You will see a higher and more stable ph to keep sps. I used to have 7.8 on ph, now I have 8.4 and acros grow like crazy with huge never seen polyps.

 

[bct15]

Your alk is to high for low nutrients

 

[Dashiki]

With a Hanna checker anything higher than .01 is high when you add in the +-.03 in the test.

To have alk that high with high po4 let the nitrates get up to 5 ppm and you will see things look better and recover.
Or
Lower your alk to 7.5-8.0 dkh and add GFO

 

[kingb4c0]

With a Hanna checker anything higher than .01 is high when you add in the +-.03 in the test.

To have alk that high with high po4 let the nitrates get up to 5 ppm and you will see things look better and recover.
Or
Lower your alk to 7.5-8.0 dkh and add GFO

+1. Since you are using NoPox for nutrients control, check the Red Sea reef care Program videos.
http://www.redseafish.com/reef-care-program/

 

[StikHedRon]

I would also look for pests like red bugs, they could be irritating the coral some.