Symphillia Wilsoni Receding

[Wurst]

Hello,

I have a Symphyllia Wilsoni in my 300 gallon mixed reef tank this is about 90 days old. The top of the coral started developing brown spots about 3 weeks ago, but now those spots have turned black and it appears the tissue of the coral is receding in those areas. I'm broadcast feeding reef chili, reef roids or marine snow a few times a week, plus frozen foods, pellets, flakes, etc - very good variety of foods. I'm looking for feedback on if and how bringing this coral back would be possible.

0 ammonia
0 nitrate
25 nitrate
.26 phosphate (just tested this today and added recommended amount of seachem phosguard to tank)
158 ppm (8.68) alkalinity (always in 150s)
430 calcium
1290 magnesium (dosed up 100 today)

 

[Wurst]

There are about 30 fish in the tank. Has lots of purigen, runs a calcium reactor, skimmer, very large cleanup crew, no bad algae issues, reverse lit chaeto refugium...

The coral is down toward the bottom of a 30" tank lit by 4 xr30 gen4 radion lights 9" above water surface running sps ab+ profile at 82% intensity.

 

[Wurst]

78 degrees, 1.025 salinity

 

[Wurst]

Also, it is on the other side of a rock structure that gets hit by an mp60. One mp60 on each end of tank. This coral doesn't get hit directly at all.

 

[DSC reef]

All your params seem on point, the coral itself looks to be bleaching. Your not ULN, I'm leaning towards the light intensity at the spot where the coral is. #reefsquad

 

[Wurst]

Thanks for the feedback. I moved it under an overhang to cut its light down a bit.

Still open to feedback from others!

 

[Sea MunnKey]

Symphyllia Wilsoni looks kinda bleach & stressed. I would dip it in Coral ReVive to rid of the brown/black stuffs.

Yeah ... temporarily place it in a shaded area. With the amount of fish you got, I would place a DIY cut out dome over it and feed it through the top opening (if it's a 2 liter bottle cap). ReefRoids, smallest fish pellets or brine shrimps etc. should do the job. Patience ...

 

[JonCollegeReefer]

I won a Wilsoni frag pack here on R2R a few months ago. In my experience they are forgiving to param swings like salinity/alk, but light intensity bothers them most. My Wilsoni's developed white oxygen radicals despite my scolys being fine in the same light. Also if their fleshy skeleton is brushing up against the rock due to flow they will be unhappy.

 

[Wurst]

Awesome, I will check into the revive. I have used a cut out milk jug once for feeding last weekend. Hard to say if it helped since I only did that once, but will keep doing that too.

 

[Wurst]

Is the revive product like coralrx? I've got coralrx already and dipped the wilsoni before adding it to the tank - just wondering if you are suggesting dipping it again in either, or specifically the revive product.

 

[Sea MunnKey]

CoralRX should be fine as you do not want to constantly move the Symphyllia for fear of more stress which may lead to it's demise. Don't want that to happen ...