Just got my 50 lbs of dry rock. What's the best way to attach these together. I have researched this alot online and found so many different ways to do this. I'm just wondering what the best way is. And what's the most safe material and glues to use for the tank and the fish. Any help will be greatly appreciated. I have seen you can use gorilla glue gel. Is it safe? Or is it best to use something else.