Black Cyano?

andi02

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#1
So I just noticed that a small corner of my tank started growing this black cyano and wondered what could be causing it or how I could get rid of it?
photo.jpg (Its actually a lot blacker in person...)
 
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#3
I think it my be an aenerobic zone in your sand bed. Don't stir it up just leave it. Get some nassarius snails they would help.
 

Six2seven

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#7
I don't think any kind of snails will get that low. Stirring it up could crash your tank. Leave it alone or stir a TINY bit once a week.
 
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