SUN CORAL questions!!

i have bought a colony of sun coral about 1 week ago...and my water parameters are

NH3/NH4=0
No2=0
NO=0
PO4=between 0.5 & 1 ppm.
sg=1.024
temp=28C
pH=8.5
Ca=340 ppm
tank has two wheeler shrimp gobies n one skunk cleaner shrimp..
.Its a 125 gal,with a DSB of 4" and approx 65 Kg of LR.The flow is 12000L/hr pump and one 3000L/hr return pump(4000 GPH total flow).
the coloney i bought is closed still after 1 week...it was open in the tank of guy i bought SC from...but in my tank it is still not opened...and its polyps r going white day by day..i have tried tupperware method but it is still not feeding...What do you guyz say?
here is the previous link! u can also compare the white skeleton of poylps in previous pics...Please help guyz...!

Here r some new pics!

 

anyone?????

 

Any way you can get the parameters of the water from which they came? Perhaps there's too great a difference...ie. PH,salinity,KH. How'd you acclimate it?

From your previous post, it sounds like the decay already began before you purchased so the previous owner may not have had it right either. And I agree that your PH and PO4 is too high,Ca too low.

 

Sun corals are non photosynthetic and require frequent target feedings ( at least every couple days if not more frequent ). They will eat if food is offered when the feed tentacles are out. One way to try to train it, so to speak, is to attempt to feed it at night when the lights are turned off.
Place a small amount of slurry around the corals, allow about 20 min for the corals to respond to the presence of food.
Once the tentacles are out target feed the coral. Sometimes this takes several attempts. Eventually if it responds it will begin to opein during the day when you feed it.
They do not require intense lighting and do better in very shaded areas of the tank IMO.
Your coral's tissue is receeding but it can make a come back.
On another note, your phosphates are too high.

 

What Corailline said. Blowing food around in a Tupperware container is not going to cut it if the polyps are not out. You need to target feed it, and place the food DIRECTLY on the mouths. It's no secret, all these things need is good water and a meaty food.

Since your last post, I had just bought a black sun coral that was in worse shape than I thought. Yours looked excellent in comparison. I waited one day for it to settle in a bit, then began to feed it last night. First I gave it some Reef Chili to try to get a response, waited about 10 minutes, then gave it small pieces of mysis. It slowly started to take it in, then I gave it more, about half size pieces. After that, I tried some Nutramar Ova, then it really started to eat fast. As quickly as I could feed each head it was taking it in.

I just finished feeding it again this morning. First the Reef Chili, then frozen Cyclops. Didn't like that so much, so went back to the Ova. I gave each large head a huge gob, and they all sucked it down. It ate a large amount of the Ova.

IMO, these corals are very hardy and easy to take care of, they just take a lot of time to get them healthy. I probably spent over a hlaf hour last night and the same this morning feeding just that coral. The polyps are all retracted, just like yours. Once the polyps extend, it'll be way easier.

 

Here's what it looked like right after acclimation. Check out the little fatty Yellow Sun.



A little later last night, after more of the flesh peeled away.



This morning during feeding. Not looking so good, but eating like a champ.



This is what the Yellow Sun coral looked like just under three months ago.