[Sub7]

What it could be?


https://ibb.co/gMg06Gg
https://ibb.co/v4b6B1g
https://ibb.co/4MnyJ2w
https://ibb.co/yVBZwDp

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[jellopuddinpop]

That actually looks like a slime mold to me. Do you have any driftwood in the tank? Do you have any shrimp or Oto cats?

 

[Sub7]

There is no driftwood or any fish in the tank.

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