Best glue or epoxy for securing coral to rock?

[TylerAquatics]

So I'm in a bit of a weird situation atm. My pincushion urchin keeps accidently knocking down a couple of my coral frags even though they're glued down. When he knocked down my leather and my acan, I tried using epoxy, but he was able to topple my acan again. What are you guys using to secure coral frags to your rock? I'm preferably looking for epoxy because it's been a pain for my dad and I trying to glue the frags and rubble just right on the contact points with the rock. Thank you!

Also- what should I do with the urchins? I don't really want to get rid of them (as in giving them back to lfs), but idk if I want to risk them knocking over my coral again.

 

[Cichlid Dad]

I can't say it the best, as I've only used this, but it works and it's not expensive. All the reefers I know use it.

IC-Gel Insta Cure Cyanoacrylate Coral Frag Glue (50g - 1.76 oz) - Bob Smith Industries https://a.co/d/7RD9Xyy

 

[Cichlid Dad]

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[UMALUM]

I've been using the tunze coral gum. It's a little pricey but mixes clean with no flaking or skimmer issues. Almost anything you use will require epoxy and glue gel to work well especially with large snails and urchins.

 

[Aquariumaddictuk]

I use d-d putty.
Comes in grey or coraline.
I cannot get frags to stick with glue regardless of brand for the life of me

 

[Jamie814]

glue>epoxy<glue sandwich is the best and strongest way to secure frags. Brand doesn't really matter.

 

[TylerAquatics]

Thanks everyone! I think I'll buy everything recommended in this thread. I will also definitely be doing the glue epoxy glue technique @Jamie814