What is this growing in my tank

reeferk2

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Hey wondering if I should be worried about this dark brown stringy stuff in 6 month old tank, I blow it off and it comes back almost immediately mostly on sand alittle bit on rock scape, will it eventually go away or don’t need to deal with it

IMG_6117.jpeg IMG_6116.jpeg
 

TARHEEL78

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You're going to need to post white light pictures to get any ID.
 
OP
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R

reeferk2

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Are these better
 

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Dodge Ram

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Cyano. That is what comes with every tank and fish. Nutrients and light feed it.
Got a bit of that in a couple tanks.
 

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