anikom15 Posted May 17 Share Posted May 17 This green stuff has been growing in and on my sand for a few months. It seems to be photosynthetic because it only goes as deep as the light will penetrate. Is it cyanobacteria? Link to comment Share on other sites More sharing options...
nabokovfan87 Posted May 17 Share Posted May 17 It could be green spot algae. I would definitely keep an eye on it. I have something similar happening in my tank (might be cyano), but I am just monitoring it for now and we will see! Link to comment Share on other sites More sharing options...
Chick-In-Of-TheSea Posted May 17 Share Posted May 17 I believe it is just detritus settling between the aerobic and anerobic layer of the sand. Rachel O'Leary mentions the line in the sand at 5:25. Link to comment Share on other sites More sharing options...
Biotope Biologist Posted May 17 Share Posted May 17 It’s algae. I usually churn the sand where it is. It will die without light 1 Link to comment Share on other sites More sharing options...
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