Hi everyone i am starting to get loads of corals now for my tank that means i will need loads of glue and putty. The glues and putty I get never harden and I really need them to especially because I have a shark in the tank. He is only small currently however I feel like I can prevent all of these corals getting knocked over easily with the right glues and putty’s. I currently use seachems glue and d-d putty. Are there any better ones I could use?

