Can someone please explain...

[Delphinus]

It totally depends on what I'm trying to do, which affects my choice of what glue to use. If I'm mounting a clean cut frag of SPS onto a disk, unless I have a poor surface to work with I'll just use cyanoacrylate (superglue) gel. If it's an odd shape then I'll use the epoxy. I've used the green stick, the Tunze stuff and the Deltec stuff. In my opinion they are equivalent products, except that the Tunze and Deltec epoxies harden in a brown or pink (I forget which is which) which blends into rock nicer than stark white does, but in most circumstances coraline covers it anyhow over time.

It's in the approach though - like Brad said, the stuff is filler, not an adhesive. So it has to surround the pieces, not just interface them. I did use it so mount some gorgonians to some rocks but I had to use elastics to hold the gorg bases down while the epoxy hardened. Now it's fine although the elastics are permanently embedded in the glue. Eventually they'll just disintegrate though.

[Aquattro]

Originally Posted by Oscar

I have a mushroom and a small piece of GSP to attach, neither of which are attached to rock. What do you suggest?

super glue or fine fishing line. I never had much luck with glue, but I'm a SPS guy, never needed it.

[Oscar]

How about this for my mushroom and GSP: I have some rock "flakes", a result of breaking up some LR. I could super glue these guys to the flakes, then use epoxy to set into the LR in the tank. That way avoiding the fishing line option.

[Aquattro]

Yup, that works

[Geofrog]

I've tried the superglue route with xenia, and it didn't work for me. They just slime over and the superglue won't hold.

[Aquattro]

Xenia, for me, worked best with thread or fishing line. Although I'd never put it in my tank again on purpose

[justinl]

I hate epoxy. Ill use it if I reallly really have to in certain cases, but otherwise screw it. SUPERGLUE. it's a godsend.

i never try to attach epoxy underwater. always out... seems to work better for me.

[Oscar]

Just testing an older tube of superglue gel. It is still not curing after 30 minutes. How long should it take?

[Sebae again]

About a minute unless you use to much. Dry end of frag and what you are mounting to.

[justinl]

yeah it should not take long at all. I like to spray the glued part with tankwater or dunk the whole thing in the tank because it makes it cure faster. how old is "older"?