most active / non shy eel?

[Experiment397]

You could also get a cork tube and silicone it to a slate then bury the slate in the substrate

 

[thefredpit]

where can you get a cork tube?

 

[Experiment397]

Try Josh's frogs T thefredpit ive ordered cork tubes from them for Vivariums before. Lots of places that sell PDF and Viv supplies sell cork in bulk and larger pieces in WYSIWYG listings. Im considering ordering some xl pieces from JF to put together a cork background for one of my tanks to cover the plumbing and give me more places to anchor some plants to as my polys grow and need more "floor space" in the tank