Red algae (possibly a nuisance algae)

willwoo

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Anyone familiar with this? I thought it was a nice macro growing on my live rock, but I’m starting to see it pop up all over the tank, growing on other macros & seagrass and even growing on a sponge. Any ideas?
 
Definitely looks similar to gracilaria but it’s much, much finer than species of gracilaria I’ve seen. I’d say the little frills are about 1mm across. Also must have a way of reproducing via some kind of spawning because it’s showing up all over the tank. Definitely getting a little nervous, especially since this is a planted tank with higher than normal nutrients. I may have to add some additional macros and see if I can get them to outcompete this stuff.
 
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