Quote:
Originally Posted by Evil-Lynn 
Nobody knows what causes BBA exactly, there are a lot of theories. One of them is fluctuating levels of CO2...
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Well, i disagree. If you take a look at the algae finder, if you have the left picture one, then you overdozed with iron. This usually happend when you use too much csm+b.
But esencially, BBA means nothing because there are several algae that are called BBA and the solutions are different in each case.
Take a look at this thread:
http://www.drpez.net/panel/showthread.php?t=154436
It is in spanish, go down until you find the algae pictures and try to identify the algae you have. There you will find the why this algae appears (which imbalance is envolved) and how th fix it.
You can use google language tools to translate the protocol you need.