Loctite Superglue gel question

[vic622]

I thought I had read that you could go frag>gel>epoxy>gel>rock, so this way you didn't need to have the epoxy curing in the tank.
My wrecking crew - Turbos - have already bulldozed 2 frags off their perches last night, so I need something to hold them in place until they're established.
On this frag, I didn't need the epoxy, so I thought I'd go direct, frag>gel>rock.
How do you affix to the rock if you can't use gel glue?
Use Epoxy & let it cure in the tank?
Vic