Is This Rock Safe For Tropical

[mikejohnson4]

Just wanted to know if this rock would be OK to use in a tropical tank with cichlids and a clown loach. Just wansnt sure what rock it is

 

[Donya]

There doesn't seem to be any picture of the rock attached to your post, which I assume you intended to have. Please try attaching one again.

 

[mikejohnson4]

All my pics are too big. I think its key largo rock. Its heavy and has a feel of rough concrete. Looks like something out of the sea. My friend had it in a tank full of Oscars but I don't want to stick something in that changes my water

 

[fm1978]

You could try uploading to photobucket and pasting in a link instead.

I don't fancy the sound of concrete at all...constant exposure to water could make it crumble over time releasing powdery and all sorts of other unknown stuff.