What type of rock?

[Squall]

Hello AA! I am upgrading my 60 gallon SA cichlid tank to 125 gallon mbuna tank. I am planning to use the type of rock in this image (image I got from web). My question is what type of rocks are those? Also how can I keep them from moving or sliding? Thanks!

 

[Congoman]

Aquarium safe silicone will make tem stick. In the wild most mbuna live in straight up rock piles so you could also try just doing a random pile of rocks. My best mbu tank was done that way.

 

[TheCommunityCichlid]

The are just some river or cobblestones you can find them at any landscaping place for ten cents a pound. Like the above posts says silicone them into small groups so you can move them if needed and this prevents falling

 

[Squall]

Thanks guys for the info!