Torch coral tentacles swelling and becoming transparent?

[kingsley_L]

Hi all,

Some of my torch coral tentacles seem to be swelling and becoming transparent when compared to other tentacles. (See attached photo)

Is this a concern?

My water parameters from yesterday were:
pH 8
Ca 405
KH 8.4
Mg 1460
NO3 0
PO4 0.16
Salinity 1.025
Lighting Nanobox mini tide 50 blue 90 white

I'm not sure if it is because of my high PO4, but I had a PO4 reading of 0.36 two days ago, and the torch coral was looking fine, at least all tentacles look consistent like the upper ones. I suspect my high PO4 was a result of using reef energy a+b, I since cut my feeding vol. down to half the recommendation.

What do you think?

 

[BiggsTheGoalie]

Torches will send out stinging tentacles...this is likely what you're seeing. Keep a close eye after the lights go out and odds are you'll find some super-long, translucent tentacles trying to sting any neighbors.

 

[chrisfont23]

Transparency in LPS corals could also be a sign of bleaching.

 

[Vgyoung]

They inflate with water so that they can get the most access to light for their beneficial alage it's like blowing up a ballon the more it's blown up the more transparen it is