Can anyone tell me the best way to glue down frags. I don't really want to move a lot of the big pieces of rock so I think I need to do it all underwater. I've just been setting them down but as Reptoreef said about his GBM clown my Skunk clown keeps moving them. My blue damsel (the starter fish in the tank now 4 years old) is always flinging substrate all over digging caves. He keeps covering some mushroom.