What could this be

[NanaPam96]

 

[ISpeakForTheSeas]

Really hard to say for sure from the pics, but my first thought would be colonial hydroids of some kind - generally not wanted, if so.

 

[NanaPam96]

Really hard to say for sure from the pics, but my first thought would be colonial hydroids of some kind - generally not wanted, if so.

Thank you, not good at aquarium pics