ID on something growing that I've not seen before from any of your photos

[splix]

Tank has been running for a little over a week, maybe about 2 weeks by now that the rocks have been covered in water.
Anyways,
a couple days ago I noticed these guys growing off of my LR in random places. Little colonies just a few mm in diameter. Little white hair like things. At first I didnt bother with them, but I've noticed more and more in the past couple days.

Had my ammonia spike over the weekend and today it's back to 0.
salinity: 1.026
temp: 79
ph: 8.2
alk: 8.5
ammon: 0
nitrite: 0
nitrate: 0
calc: 420
mag: 1500

 

[theMatrix]

I had somwe during my cycle. Didnt know what it was. Seemed like part of the die off as once the rock cleared they stopped coming back

 

[splix]

I had somwe during my cycle. Didnt know what it was. Seemed like part of the die off as once the rock cleared they stopped coming back

I'm using prject reef rock 2.1, which is man made. There is no die off on my LR.

 

[Sk8r]

If it turns out to be algae, as in that being a stem, prepare a bowl of hydrogen peroxide and dip that area of the rock for 30 seconds, rinse in tank discard water, return to tank. Rooted caulerpa weed is a horrid plague in a display tank, and does first appear like that. It's toxic if eaten, spreads like mad from any root, stem, or spore, and can choke out corals.

 

[splix]

If it turns out to be algae, as in that being a stem, prepare a bowl of hydrogen peroxide and dip that area of the rock for 30 seconds, rinse in tank discard water, return to tank. Rooted caulerpa weed is a horrid plague in a display tank, and does first appear like that. It's toxic if eaten, spreads like mad from any root, stem, or spore, and can choke out corals.

Are there any clean up crew members I should get to take care of it before it gets out of hand? I ask because some of the spots are on support rocks that I cannot take out without taking most of the rest of the rock out.

 

[splix]

Now you got me scared, I dont want that in my DT haha. looks like it might be time for a cleanup crew