Grey tubes under sand

[FishI]

Hello Nano reef,

 

I have been blowing the sand around my 20 gallon tank and kicking up detritus and yucky stuff. I have been noticing these grey tubes that kept on coming out of the sand. They float a little longer then the sand and then settle. I thought it was just general fish crap stuff.

 

I blew the very top layer off the sand while blowing a nearby rock and i saw them but they where all in a formation sticking straight up. See pic below. Any ideas. They dont seem to move.

 

Thanks in advance.

 

 

 

 

 

[smeagol108]

Have always seen stuff like this in the sand. No clue wwhst it is. Lol

[Elizabeth94]

My guess is that they are tubes of fine sand that micro life, such as worms, use to move around in. But what do I know, I went bare bottom so I don't see any of that neat sand stuff anymore lol.

[FishI]

Have always seen stuff like this in the sand. No clue wwhst it is. Lol

 

OK well i thought for a while my sand was super dirty because of it. But maybe its a good sign.

[smeagol108]

Yea every time I stir my sand I see it. I try to swirl an area of the tank each time I do water changes with pumps real high to suspend detritus.