A uv sterilizer will not kill black beard algae. It only kills free floating algae (green water).Peroxide won't melt vals. Honestly though, I did a one two punch and it killed a lot of my algae (look it up)
Of course, it all came back when my co2 went out *sigh* So i have to do it again, plus I'm going to get a UV sterilizer because I'm tired of BBA specifically. I WANT IT DEADDDDDDD.