Yes, make sure you're dissolving the CO2 into the water. Some sort of diffusion device is used for that and ppm quantifies how many molecule of the stuff is in the water.
There are several methods to kill BBA
1. use Hydrogen Peroxide. Don't use more than 2ml/Gallon of it in the water. It can kill fish an plants.
2. use excel or something equivalent in Europe. It's the carbon supplement whose main ingredient is Glutaraldehyde. Double the dosage. In addition to being a supplement, it also is an excellent algaecide. Again, it could kill fish and plants if overused.
The BBA should turn red when it's dead.
Last edited by mistergreen; 09-01-2014 at 09:07 PM.