Leptastrea and blasto frag recessing help!

[Brian1f1]

High, I’ve got a bunch of corals in my tank mostly lps (maybe 60 frags and colonies over all). I had three leptatrea glued to the back wall. Two, a blue one from cherry corals and a John Deere from aqu SD have done well there. My favorite, burning leptastrea from WWC was there for about a month (since I got it) and it stopped opening, flat except some expanded polpys on the back. It’s a small frag. I moved it Saturday to a higher light higher flow area, thinking it was dim light low flow, and noticed one corner looked worse yesterday. Today when I got home from work several entire polyps are gone! I don’t know if it if doesn’t like the move, or if it’s just going...

Should I drop it to the sand bed under a ledge, go super low flow and shade? Should I superglue over the dead skeleton to try to stop the receding? Any other ideas? Pics are yesterday and tonight.

I also have a single blasto I think was flow damaged (my fault). I moved it to very low flow last week, but it seems to just be very slowly receding. It’s just one head... any thoughts for it?

Thanks!!

 

[Brian1f1]

Top down view

Can see healthier polyps on back if I can save them.

 

[ZoWhat]

Not sure its hi intensity light damage

High NO4? Maybe high Alk? What's your parameters?

 

[Brian1f1]

I’m not 100% sure. Need to break out the test kit when I get a minute. I know Alk was 11.5, calc 500, salinity 1.026, temp 76, yesterday. I only have ATI for phosphate btw.

High PO4 does that to lepestrea? Wouldn’t all my coral be suffering?

 

[Brian1f1]

Could be light. Should I drop it to the sand bed for now? Glue over the dead tissue or leave it?

 

[KonradTO]

Did you find out the reason in the end?