piercho
10/06/2004, 01:07 PM
I find your articles especially usefull and am glad you take the time to prepare them.
The addition of vinegar to limewater has been correlated with the growth of what appear to be bacterial mats in some aquaria. Presumably, the bacteria thrive on the acetate provided by the vinegar. I've also experienced this. Specifically, addition of acetate (in limewater) seemed to be the event that started a long period of cyano mats on the sandbed that persisted weeks after the acetate additions were stopped.
My notion is that the acetate is not, directly, food for the Cyano mat. I think that other bacteria use the added organic carbon, and in the process take up available N. This may set up a low N:P situation where N-fixing cyano can compete well in competition for nutrients. I also think that the formation of the cyano mat may restrict penetration of O2 into the sediments, dropping the pH, and liberating additional P. So, once the mat starts to form, it could be a self-feeding process.
The addition of vinegar to limewater has been correlated with the growth of what appear to be bacterial mats in some aquaria. Presumably, the bacteria thrive on the acetate provided by the vinegar. I've also experienced this. Specifically, addition of acetate (in limewater) seemed to be the event that started a long period of cyano mats on the sandbed that persisted weeks after the acetate additions were stopped.
My notion is that the acetate is not, directly, food for the Cyano mat. I think that other bacteria use the added organic carbon, and in the process take up available N. This may set up a low N:P situation where N-fixing cyano can compete well in competition for nutrients. I also think that the formation of the cyano mat may restrict penetration of O2 into the sediments, dropping the pH, and liberating additional P. So, once the mat starts to form, it could be a self-feeding process.