We are back after five weeks and we are reporting some changes to the column:
Dark Column: An increasing of the color intensity is noticeable when we see both column photos together. This may be a consequence of bacteria development, as a of microorganism concentration.
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Light column: After two weeks, water has become murky and mollusk had apeeared. In the middle of the column orange colour has increased a lot because Fe (II), produced by bacteria that consume Fe (III), reacts with oxygen, produced by new cyanobacteria that has grown. Besides, we notice anoxygenic part because iron oxide hasn´t been produced in this part but sulfure-bacteria grow. Finally, in the bottom of the bottle we find totally anoxygenic zone where we can find sulfure-bacteria.
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