Green leafy algae - ID please?

[SuncrestReef]

I have a new type of algae showing up on several rocks in my tank. It has a flat leaf or ribbon shape about 1/4" across. It comes off easily, but still leaves a small part stuck to the rock and grows right back quickly. Nothing in my tank seems interested in eating it. (Kole tang, emerald crabs, snails, etc.)

Can anyone help ID it, and any recommendations to eradicate it?

My tank is about 14 months old. Here are my parameters:

Temp = 78
Salinity = 1.026
pH = 8.0 - 8.4
Alk = 8.2 dKH
Cal = 420 ppm
Mag = 1350 ppm
NO3 = 4 ppm
PO4 = 0.03 ppm

 

[KJ]

Look like Ulva.

 

[LiveWire]

+1 on Ulva. Seems to be coming up in tanks on the forum's lately.