Garra Gotylas or Garra Rufas.
Add them and keep lights on for minimal amounts of time.
Do you add Co2 regularly? If not, that's probably why you've had an outbreak.
Assuming it's growing on plants, I've never had brown algae on anything but live plants.
When I had an outbreak when I first got into planted tanks, all I did was turn the lights off as much as I could, and started adding Flourish Excel plant supplement, and flourish organic supplement (As directed) and 2 weeks later I was brown algae free.