How can I do this?

[Reggae Fish]

I have a yuma that I absolutely love but the rock it's on is terrible. My only suggestion was to chisel the rock down to a 1/2 golfball size by trottie.

Any other suggestions?

Exacto knife at the base (how dangerous is this?) This is what I'd prefer---If this one, do I just superglue it when I'm done?

Chisel (I don't really want to do this)

Dremel tool??? (I have one with a bunch of stuff for it) or is the rock too hard

Also, can yumas be placed on the sand on the bottom? like burying the rock but keeping the yuma above to be able to expand?



I don't want to mess this up but I'm going to have to learn how to do these things in the future and the best way is to ask questions. So, I appreciate all your help!

Thanks,
Justin

 

[Salamander]

You say you don't want to do it but I think chisseling is the best, easy and quickest method.