How do you mount corals to mature rock??

[Leon Gorani]

So I have some rock in my tank that looks like it has algae or something all on it, I want to glue or mount some corals on frags onto this piece of rock but I am not sure what is the best way to glue them to this rock? I will post a pic of the rock in my tank to show you. The rock is prettt smooth so it’s not like pukani rock
should I use super glue? Or shouldI use epoxy with super glue to stick it onto the rock? I can try to use the Instant Ocean Holdfast epoxy, which is what I used to build my rock structure, but that was before the rock was even in the tank. I just don’t know if it will hold and stay there with the cured rock in my tank already. Thoughts?

 

[BadAsh]

I'm hardly an expert but I find super glue pretty efficient if you kinda grind the plug on the surface of the rock. Just my two cents