Tearing down a tank and need to UNaquascape.

[7hogwarts]

I'm in the process of tearing down a tank that has been running for 25 years. Some of the base rock has become so encrusted I literally can't pull it apart to access some of the anemones and shrooms. I've removed as much as I can using my fragging cutters. I've considered using a prybar, but I'm afraid the pressure might break the glass. Any suggestions to help remove/break the rock? Maybe if there was some sort of saw to use underwater?
Thanks

 

[Troylee]

I'm in the process of tearing down a tank that has been running for 25 years. Some of the base rock has become so encrusted I literally can't pull it apart to access some of the anemones and shrooms. I've removed as much as I can using my fragging cutters. I've considered using a prybar, but I'm afraid the pressure might break the glass. Any suggestions to help remove/break the rock? Maybe if there was some sort of saw to use underwater?
Thanks

Not sure how big the rocks are or what your up against but I’ve known people to get a long attachment for their dremel and use cutting wheels inside the tank.