DIY Caves?

[portabuddy]

those are awsome man i made one just like that usin plastic wrap on a tennis ball to make a curved one, the fish ould fight over is, i put some slate under it but it never took, then i finaly removed it since fish where loosing fins over it.

I love the small white ones.

 

[Guppy's_Hell]

If i buy the lava rocks should i boil them or something like drift wood before using?

 

[portabuddy]

its a exelent idea but i never have, i guess im dumb that way .