Unusual growth on my torch

[Bzborder92]

The tanks been running for 140 days and is doing great. I hava a 20 gallon AIO with 16 corals, 3 fish, and a rather good size clean up crew. However, just recently I've noticed a strange sort of "sponge" like growth at the base of my torch coral. I did notice in the last week my torch hasn't been opening fully as normal. It has done this in the past where it just wouldn't fully extend for a day or two. Is this something that should be if concern? I have a hammer and a Cristata near it but both are full and happy when lights on. This picture is several hours before lights on.
Parameters:
Temp- 80 f
Ph- 8.4
Nitrate: 11 ppm
Phos: 0.1
Alc- 10.3
Calc- 483
Mag- 1470

 

[vetteguy53081]

Ciliate sponge and will continue to grow
Try to peel off and discard
Not a filter feeding sponge so just taking up space