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My plants seem to have grown black fluff balls on them?? Any ideas what it is? Sorry for bad pics but they're at the back of the tank so I had to zoom.
BBA is Black Brush Algae. Your plants use carbon as a building block for growth. You can either use SeaChem Excel or inject CO2 to add a source of carbon to your tank. There are two options to inject CO2: DIY yeast-based systems and pressurized systems. There's really too much to explain here.