Weird Thing in Tank

[Fylgja]

I used to have a Chinese Algae Eater to clean my tank, but it started attacking my fish, so I removed it. Brown algae started forming in the tank about a week after that, and I noticed these tubes on rocks/plants/glass. Then I observed a worm coming out of a tube-husk. Does anyone know what it is, and is it as bad as planarian? (Harmful to fish, etc). And lastly, what is the best way to get rid of it?

 

[twentyleagues]

That looks like fish poop. Can you get a video? Maybe a fish has parasites?
Detritus worms usually live in the gravel not on decorations but maybe? If its a detritus worm they are not an issue.

 

[TwoHedWlf]

That is poop.
https://en.wikipedia.org/wiki/Feces

And to get rid of it, vacuum it out during water changes.

 

[Zanzag]

Looks like poo but could maybe be these

Tube Worms

Last night as I was sorting through various tiny wasps and things and getting them ready to send to the USDA Systematic Entomology Lab for identification, I wondered what ever happened to that worm…

bugtracks.wordpress.com

 

[Fylgja]

That looks like fish poop. Can you get a video? Maybe a fish has parasites?
Detritus worms usually live in the gravel not on decorations but maybe? If its a detritus worm they are not an issue.

That is poop.
https://en.wikipedia.org/wiki/Feces

And to get rid of it, vacuum it out during water changes.

It definitely is not poop. I took a video of it (which I can’t post), and something comes in and out of the husk. My fish swam by it, and the thing disappeared in the husk it made, and when the fish left, the thing came back out.

 

[Fylgja]

Looks like poo but could maybe be these

Tube Worms

Last night as I was sorting through various tiny wasps and things and getting them ready to send to the USDA Systematic Entomology Lab for identification, I wondered what ever happened to that worm…

bugtracks.wordpress.com

This looks like the same ‘shavings’/left over stuff that I see, yeah.

 

[Fylgja]

Updated pictures. Literally just hours after my first ones.

 

[Zanzag]

Anything wild "found" that you put in the tank? Could be hitchikers

 

[Fylgja]

Anything wild "found" that you put in the tank? Could be hitchikers

How do I get rid of them, are there any medications I could treat it with?

 

[Zanzag]

As far as I can tell they are harmless. But short of manual removal no idea on how to get rid of them. If they are what I linked to I believe they feed on detritus so unlikely to cause harm.