Black Beard Algae Go Away On Its Own?


New Member
Jul 18, 2017
Does BBA go away if you keep co2 at 30ppm? If so how long does it take for it to go away. I've been plague with bba for years now and I'm totally fed up with it. I have tried h202 treatment, kept my tank absolutely clean with trice weekly water changes using turkey baster to dislodge detritus. The plants are very healthy but the older growths have small bits of bba on them. Since I've read that bba is attributed to co2, I've cranked up co2 just enough that fish aren't gasping for air. I'm guessing its at 30ppm or higher cause I can't imagine it being lower since the livestock is about to gasp if I add anymore co2. About 4-5 bubbles per second using a neo large diffuser for my standard 10 gallon tank.


Super Moderator
Staff member
Lifetime Member
Jun 20, 2016
no, they will stick around until they are shaded enough or manually removed. CO2 ( at aquarium safe levels) on its own won't kill algae, but it will support healthy plant growth. When they are shaded enough for a long time the bba colonies usually drop off very easily