I found a great solution for BBA in a freshwater aquarium. It's a mix of things I've done to cure my Blackbeard algae in my 29 Gallon tank. Hope it helps.
Hydrogen Peroxide 3% applied directly to BBA during water change.
Flourish Excel dose as per your tank size weekly (read dosing instructions on bottle).
![](https://i.ytimg.com/vi/xx7t76f6-A0/maxresdefault.jpg)