Help with id

[Miza]

I have this red "plant"(?) that has grown quickly on my LR. Is this OK or something that should be removed? In the last picture are LOTS of little white things that look almost like tube worms. They are behind the wall of the corner flo, in the corner with the PVC pipes leading down to the sump. How do I get rid of these? And last question, I have coralline all over my tank. Some of the LR is already completely purple, as is my thermometer, powerhead, and the shells of many snails. Is there such thing as too much coralline?

 

[ritter6788]

The first pic looks like rose petal algae (sorry I don't know the scientific name). The other pic is pineapple sponges. Both are harmless. If you don't like the algae you can pluck it out

 

[Mike J.]

I'm thinking this:
Marine Plants in the Aquarium

It wouldn't last 2 minutes in my tank.