What's Living Under My GSP? (video)

[Razorbacks]

There's something with long tentacle like appendages living under my GSP. The tentacles come out the most when I shutoff flow to feed. You can see there's a second smaller one coming out of the same opening. It's inside a sort of white crusty looking thing.

 

[blaxsun]

It looks like some kind of worm, but I can't place it.

 

[Uncle99]

Acts a bit like a worm.
Which, IDK.

 

[blaxsun]

Acts a bit like a worm.
Which, IDK.

< insert > weekly worm » here «.

 

[Razorbacks]

Would removal be recommended? Unsure if this is good/bad/or neutral for the tank.