Dismantling any ideas help

[Porkchop95]

So I picked up this prebuilt rock and zoa structure and I wanna re aquascape my tank any one have ideas of dismantling it my first two thoughts where a dremil and going slow or just taking a hammer to it since it’s held together with some concrete almost like material

 

[Retro Reefer]

I use a small sharp angle chisel and hammer to break up stuff like that, if you score it with a drimmel along where you want the separation it helps make a cleaner break

 

[Shroom boi 101]

A chisel and hammer works great but if you are looking to get more into fraging you should get a gryphon band saw