Spiney Corralline algae?

WannaRace

Reefing newb
Hi all,

If no one can ID this with a description then I'll snap a pic but for now here goes...

This grows to the size of a baseball in about 2 weeks. It is very thin, delicate, spiney and branch-like, purple in color, and it grows in my overflow ONLY. When I remove it, it comes out in clumps very easily. Does anyone know what this is and what it indicates as far as water quality?
 
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