Arbarbash Posted December 24, 2023 Share Posted December 24, 2023 I have these black spots that keep forming on my sand. I will clean the sand during my weekly water change but within a day they are back. Is this Cyano? It’s more black than any of the pictures I see. Thanks in advance. Link to comment Share on other sites More sharing options...
T. Payne Posted December 24, 2023 Share Posted December 24, 2023 Does not appear to be, cyano is green and slimey looking. Link to comment Share on other sites More sharing options...
JoeQ Posted December 24, 2023 Share Posted December 24, 2023 Is there an odor coming from your tank? In the early stages it'll smell earthy; similar to a green house smell. 1 Link to comment Share on other sites More sharing options...
Arbarbash Posted December 24, 2023 Author Share Posted December 24, 2023 No smell. It is a black film on the very top of the sand. When I remove it it comes up as one sheet of algea Link to comment Share on other sites More sharing options...
JoeQ Posted December 24, 2023 Share Posted December 24, 2023 Is this a new tank? 1 Link to comment Share on other sites More sharing options...
Arbarbash Posted December 24, 2023 Author Share Posted December 24, 2023 (edited) No, it’s been running for about 6 months. Nothing new added to the tank in the past four months and this algea started about 3-4 weeks ago. I dose easy green once per week(10ml) and easy Carbon daily(10ml). Both of these have been being dosed for four months since adding the plants. Edited December 24, 2023 by Arbarbash Link to comment Share on other sites More sharing options...
tike Posted December 24, 2023 Share Posted December 24, 2023 Definitely cyanobacteria, I have this black form of it in the past. I would cut back on adding nutrients for a bit and increase water changes to once a week. Give it a month and see if that helps clean it up. 1 Link to comment Share on other sites More sharing options...
Arbarbash Posted December 24, 2023 Author Share Posted December 24, 2023 Should I stop doing both Carbon and Easy Green? Link to comment Share on other sites More sharing options...
tike Posted December 24, 2023 Share Posted December 24, 2023 On 12/24/2023 at 2:33 PM, Arbarbash said: Should I stop doing both Carbon and Easy Green? I would, just for a month. 1 Link to comment Share on other sites More sharing options...
JoeQ Posted December 24, 2023 Share Posted December 24, 2023 On 12/24/2023 at 5:27 PM, tike said: Definitely cyanobacteria, I have this black form of it in the past. I would cut back on adding nutrients for a bit and increase water changes to once a week. Give it a month and see if that helps clean it up. I've never seen or even knew that there was black version. Do you know what causes the diffrent colorization? Is this version normally orderless? Link to comment Share on other sites More sharing options...
tike Posted December 24, 2023 Share Posted December 24, 2023 Can cyanobacteria be black? Blue-green algae (BGA) is not actually an algae but rather a cyanobacteria – a very diverse and resilient group of bacteria that uses photosynthesis like plants. In freshwater aquariums, it's known for its vivid blue-green color, but it can also appear in shades of brown, black, or even red. Link to comment Share on other sites More sharing options...
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