Need help what is this?

[Ryanh]

I've had this tank set up for several months now parameters are good I bought the rock dry and know that you can get different kinds of algae growing on the rock but this isn't slimy or stringy. The green turns brown when the light comes on. Also I don't know what the second thing is growing on the smaller rock in back by the pulsing xenia it is a redis orange and glows udder the blue light. Thanks for any help identify these two things.

 

[Reef Psychology]

Not sure exactly which you're trying to id, but on the first picture on the left I see three corals. Top may be xenia, the middle one a pipe organ (they often have reddish pipes topped by polyps) and the bottom a green star polyp. The Xenia and green star's are very fast growers so watch them as they can take over a whole tank.

 

[Ryanh]

Not sure exactly which you're trying to id, but on the first picture on the left I see three corals. Top may be xenia, the middle one a pipe organ (they often have reddish pipes topped by polyps) and the bottom a green star polyp. The Xenia and green star's are very fast growers so watch them as they can take over a whole tank.

I was asking about the green growing on the rock is it algae or what exactly is it and the same with the orange red stuff growing on the rock with the xenia. And I'm not sure what you were calling a pipe organ but I believe it is the leather tree I have in the back he just shrunk bc the light had turned off a bit before.