Scollys rapidly receding - Need advice

[IMegaSquirt]

I have had these 2 scollys since November of 2019. I have never had a problem before. They have always been inflated and puffy and have always extended there feeder and have accepted food. I have fed scallops, lps pellets and reef roids. The picture of them below were they look healthy is Christmas week. The other 2 are what the look like now. They are in an area of gently flow and indirect lights. They are under AI Hydra 64HD lights and have been for about 8-10 months. None of my parameters have changed.

Ammonia 0
Nitrite 0
Nitrate 5
Phosphate .03
Mag 1320
Cal 412
Alk 9.0
Temp 76 at night 78 day
Salinity 1.025

Everything else in my tank (with exception of a red goniopora) is doing well, growing and thriving. Other corals are 3 leathers, misc zoas, acans, frog spawn, hammers, gsp, xenia, blastomussa and a clam. Nothing is near them to get stung by anything.

I dont know if I should change anything because everything else except those 3 corals are doing fine. Is there anything else that I should look/check for. I ordered coral rx dip to dip them and see if that helps but it won't be here for a couple of days and there is no LFS here. Any advice would be greatly appreciated. Thanks in advance!

 

[tnewell]

What’s your livestock in the tank?

 

[zuri]

you've got to clean the algae off the skeletons or they will RIP

 

[IMegaSquirt]

What’s your livestock in the tank?

Clown fish, purple tang, leopard wrasse, shark nose goby and a damsel

 

[IMegaSquirt]

you've got to clean the algae off the skeletons or they will RIP

The algea only started because it receded back. It never had algea before. Ill try cleaning it off with a tooth brush later

 

[zuri]

the rock behind is coated in the same algae

 

[Sarlindescent]

I had a similar issue happen. Turned out I had some very small baby aptasia on the skeleton. The fix was just to shave the dead skeleton off with my gryphon. If I didn't have the saw, I would superglue them. Another possible fix for these types of corals is a light target feeding every other day.

 

[tnewell]

Does it still open looking for foodv

 

[jspuck25]

Could it be that it doesn’t like the flow. Mine receded to the point of almost nothing left. I moved it to a different spot in the tank and it has slowly recovered. No other changes were made. Just a possibility is all.

 

[MTsquared]

Had the same issue with a Bleeding Apple and a small Red Croc Island, despite all efforts to save them they eventually just continued receding until they were gone. I also did target direct feedings and had no issues that I was able to detect in water parameters.