Help me. My sps is dying.

[thanhtran68]

Hello.
My tank: 60g.
Alk 7.9.
Ca 430.
Mg 1400.
No3 20.
Po4 dont know but with sera test 0.
My light radion 4 pro. Schedule: 4 hours 50% all color, 4 hours sps ab+.
Im runnin gac and gfo 247.
My sps lose color and fade out very quick in three days. Its usually green with pink polyp. But now it almost white. Dont know the reason and dont dose anything. Please help me. Sorry because English is not my first language.

 

[Tahoe61]

Hi and Welcome to R2R.

How long have you have the sps?

If able please post an image to determine if the sps has lost zooxanthellae rather then lost tissue.

Thank you for posting parameters.

 

[I luv coralz]

A picture would help a lot.

 

[thanhtran68]

Thanks for your helps. My tank is about 2 months old. I know maybe it’s not mature yet. But this is maybe my strongest and fastest growing sps in my tank. But everything else seem fine.
I have 2 actives in several days before this happen:
1: i blingly dosed 3 caps of seachem strontium, manufactor advice. Because
2: i bought 2 yellow gobbies. I searched on internet and knew they are reef safe. But ... maybe they nip my coral polyps. I saw several times.
3: i have about 300gr passive zeolite media (not KZ stuff) in my sump, slow water flow area.
One more thing Potasium is 420.

 

[Tahoe61]

Yeah do not dose strontium unless you have a level to go by. Looks like there is tissue so that is good.
Is the zeolite addition new?
I am not too concerned about the gobies.
The coloration change is probably related to chemistry swings if there are no changes in lighting.

 

[SashimiTurtle]

If PO4 is 0 and you are running heavy GFO, I'd stop the GFO for right now and do a few 15% water changes. Try using a little bit of coral food a few times a week also. GFO is very good a stripping the water and SPS can pale out quick with too much use.

 

[thanhtran68]

Thanks for your helps.
Tahoe61: don’t understand clearly about good sign of tisue lost? Maybe it will change color and get better? Because everything else is not like this one.
Robin: Lastnight i took off the gfo just for sure. Because i dont have Hannar Checker so i dont sure about O PO4 . API testkit is not accurate in this low range.
I have a diy cheato reactor. And i feed 2 times daily with pellet, nori, artemis eggs, polyb lab ... to slowly increase my PO4.
Ok lets wait and see, i will update nextweek.

 

[KCSUMPS]

Did you figure out what was causing your issue?