I'll bet you that within days, it will reappear. What you have is mustard algae, it starts as a fine yellow/brown layer almost like clay dust and will show especially in any crevices.
Currently, you've suspended it by running the barracuda, it will settle and grow quickly on you.
The ONLY way you can get rid of it without fighting it for months and months is if you shock really high for 3-4 days, by really high, I mean getting your free chlorine up to 20 - 25 ppm and keeping it there, while running your vac to suspend the algae and allow the chlorine to completely surround it and kill it off.

Others will chime in here and disagree with me, some others will want numbers before they will give advice, but the only thing that's going to work for you right now (whether ph and alk is high, low or indifferent) is shocking the heck out of it.

You can follow my advice or not, up to you, but this past summer, a number of people had this algae and the only way they managed to get rid of it is the way I posted above.