Strange growth on hammer skeleton

[Yellow Eyes]

I hate posting my problems, and I am sure the solution is out there, but its too specific to try and find.

Anyway, my hammer coral is in day #2 of being closed up after I thought taking to my tank very well (I've had him for over 3 weeks). I haven't changed anything in over 1.5 weeks. The only addition was a candy cane coral on the other side of the tank on Saturday.

Today I noticed a few strange growths on the skeleton/base(?) of the coral. One looks like roots, the other looks like dust bunnies? I am hoping someone can identify either for me, if they are bad, and what to do about it? Is it irritating my coral? It only seems to be growing on side facing away from the light (my light, kessil is center, my hammer coral is on the left side of the tank).

Parameters:
salinity: 1.026 (refractometer)
ammonia: 0
nitrate: 0
phosphate: i don't have a test, procrastinated buying one, this could be my reason to
kh: 9 -> measured saturday
ca: 400 -> measured saturday
mg: 1400 -> measured saturday
ph: 8-8.1
temperature: 76.5-78.5

Only algae is one tiny spot of cyano (2 month old tank). Thanks for any help!

 

[cloak]

Bryozoans perhaps?

 

[Yellow Eyes]

To begin, I don't know why I wrote hammer. I just got home from work when I wrote this, it's a frogspawn haha

As far as the bryozoans, are they good/bad? I can't find much information on them. Could they be the source of the frogspawn closing up?