Plate Coral Problem?

[jtnova13]

Hey, I came home today and my plate coral looked a little bad. The tentacles don't look as bubbled up as usual and i could see it's mouth? it looks like a mouth down the middle of the thing.

here is a pic

I left it a little bigger so you could see better.

Tank stats are:
Nitrite: 0
Ammonia: 0
Nitrate: 0
Phosphate: 0
SG: 1.026
pH: 8.3
Temp: 78.8F


It's under 4x54 watt (2 actinic blue, 2 actinic white) T5 for 12 hours a day, is that enough lighting? It is on my substrate and is getting enough flow (the tentacles flow gently back and forth)

All other corals are doing well.

Any ideas?

 

[ben1987]

Water stats look ok. Lighting should be fine for it. All i can think of is its having a sulk because something has annoyed it. Also test for mag alc and calc.
What are you using to test SG? have you calibrated it recently?

 

[jtnova13]

refractometer, i calibrated it about a month ago. I am going to recalibrate it!

I don't have those test kits yet, they are in the mail

I've been using reef crystals for water changes and I only have this coral, a hammer frag and a leather coral frag, so hopefully not all the calc is getting used up.

 

[TigerIssey]

You will have some phosphates, I can see Cyanobacteria on the sand bed. You will test 0 due to the phosphates being taken up by the Cyano.

Are you using Phosphate remover, if so, double the dose.

 

[Anguilla82]

if its mouth was open it could have just eaten something, or was releasing some waste. they can look a little odd when they do that..

have to say it looks perfectly healthy to me!
cracking plate coral

 

[jtnova13]

Tina, I'm using rowaphos, but it's over a month old, I may need to replace it. I'll double the dose too!

 

[jtnova13]

<3 Tina

I changed the rowaphos and doubled it. Plate coral is all swelled up and loving life! hammer seems to be happier too!

Thanks, I may be adding a fuge with chaeto or a phosban reactor in the future!