Tuxedo urchin question

[daplatapus]

So I'm having a terrible time controlling some algae. Not sure where it came from probably from my live rock or a frag that came in. I've been running a BRS GFO reactor for over 6 months with their high capacity GFO with no results other than killing off my chaeto. I think tuxedo urchin's are very cool and heard they really like all types of algae. Will a tuxedo urchin help in the control of dictyota algae?
My tank is just a couple months shy of 1 year old, and has been rock stable for the entire time. 77 gal DT (full reef, spa, lps and softies) with 80 gal sump and a remote 20 gal cube. Approx 150 gal total water volume. For live stock:
1 flame angel
1 Yellow eye Kole tang
2 occelaris clowns
2 schooling banner fish (rescues from a friends moving disaster)
1 starry blenny
1 sand sifting starfish
1 purple fire fish
1 green mandarin
1 2spot blenny
misc snails and hermits