So I removed all my rock to remove a trigger with a swollen chin and not eating. Also gave me a chance to brush all the dang GHA I been battling for months. While pulling out the rock. Pieces that were cemented broke. So I can't put it secure enough the way I had it. And being now barebottom. It's risky. I'd like to make sure it's safe. That being said. Is there a putty or something to put rocks together while in the tank. Or do I need to take it out and cement. Let dry and put it back in?