They are on 30 Lb (15 kg) bottom boulder in the rockwork, removing it will require removing all rocks above and around in the prepared containers... Mushrooms originally were on a small rock, attached to the big rock, but I missed the time, when they migrated onto the big rock. And Reef Bones are not workable by tools: I spend 2.5 hours trying to divide the big rock in two small. Why the worst of all possible combinations always happen in my tank? (Sound of teared off hair.)

OOT:
I really like your signature. This is what I'm trying to do in the past 2 years. Good to know, that I'm not alone in this.