It's an algae, it's a bristle, it's a....

[Txplicit]

Broke down tank to give to a buddy. Was scrubbing some LR to use a piece for seeding in my new tank. Sifted sand and noticed this.... orange, red slimy texture with long string tendrils or strands. I noticed them in substrate but thought it was cyano.

 

[Crabs McJones]

spaghetti worm

 

[Florida Sunshine]

Reminds me of a Medusa worm a bit.

 

[vetteguy53081]

Agree on Spagetti worm.
Harmless and they feed on detrious. If you are seeing a few, it indicates too much detrious or food available and tank needs more periodic maintenance

 

[Txplicit]

Water change ever 2 weeks. But I don't siphon substrate. Thanks guys