DIY pvc ideas?

[SolusUmbra]

I ended up getting some 3/4 inch pvc for a project but it turns out I got the wrong size so I figured I would ask if anyone knows any decoration ideas I could use to make out of it. My tank is small only 5 gallons and right now sits empty.

 

[Angellove78]

Alot of people cut them up and use them for little tunnels for fish to hide.cut them in 1/2 long way or keep them round. Shave off the ruff spots. And good to go.