White string floating around

[Willapotamus]

Hello everyone! I am 3 weeks into my 55 gallon tank cycle and I just moved my over the tank filter to move it the right a little bit and out flew all this white fluffy/stringy stuff and it’s all over my tank! Is this good bacteria or is this bad? I just added two Clownfish in today.

Salinity - 1.025
Ammonia- 0.10 ppm
Nitrite - 0
Nitrate - 0
Phosphate - 0

 

[vetteguy53081]

Hard to tell especially being distant and black and white

 

[BostonReefer300]

Could be bacteria or numerous other things. I wouldn't worry about it. Skim it out with a net if it's bothering you. Congrats on the new fish! Have fun!

 

[Ro Bow]

could be poop?