Red/Pink cotton like algea

This red/pink algea came on my new rock. As well as the plants, duster, and small pink sponge shown. Any idea what it is before I irradicate it?

So far, physical removal works, then it's back. Removal uproots the plants alot too. I've a brown powder tang on order. My snails and crabs don't seem to even notice it. I place them in the middle of it, and they move away. Brown algea, a differnt story. Placed 4 snails on one rock with brown algea, and dinner was served.

I'm over skimming some may say, but this is a temp system till I build my stand for a 100g mini reef. I'm using a Lifereef 36" x 6" counter current skimmer on a 46g bow front tank with about 65# of different rock. Mostly Tonga branch and Totoka. about 50% of weight.

This algea is more like cotton balls, and only on the rock, unlike slime which typically starts at the substrate, in a web fashion.