Lava rock

[Raul-7]

Is it safe to use as decoration/rock-work or is there a risk it will injure the plecos?

[jp11biod]

In my experience it was more dangerous to the free swimmers dashing into it. The only thing I used lava rock for since was crushed up for a biological media.

[Raul-7]

I agree, seems like dynamite in the wait. I mean if we use it remove callus skin then I'm sure it will make short work of an unsuspecting fish that bumps into.

I'll look for more rounded, smoother rock this weekend.