144G Half Circle Mixed Reef

[Delphinus]

You may already know this but I'm compelled to share this tidbit. Underwater epoxy is a putty and not an adhesive. Ie., if you use it to "stick" one thing to another, you're going to be frustrated because it will fail 19 times out of 20.

Instead you have to use it as a filler and fill in gaps and then let it harden. So to make two rocks stick together, you have to set them in such a way that they sit together naturally, and use the epoxy simply for stability support.

If the rocks don't fit together naturally then the epoxy will fail since it has no rigidity during the cure process. Instead, you'll have to shunt and shim with rubble, or take the rocks out, drill them and insert rods (acrylic, fibreglass, pvc, whatever) to form the structural base.

Hope this info helps!