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That premise is totally wrong. You need some CO2 in a planted aquarium and that doesn't cause brown algae outbreaks. Where did you read that? Brown algae, or diatoms, can be caused by stirring up the gravel, but will usually recede in a tank with sufficient lighting. Otocinclus will eat diatoms.
 

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BBA or Black Beard Algae can be caused by low CO2. I'm not sure I'm understanding what's being said here as it may be taken out of context. I would look at the rest of the thread and make sure that is not the case. If you still conclude that is what is being said then by all means, follow it.
 
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