yep thats pretty much all there is to it. If you plan on drilling your tank make sure you get a proper drill bit. My opinion with drilling glass is its a hit or miss situation. Either you get through cleanly or you get unlucky and get a crack. I got unlucky when we drilled my drain hole in my 10 gallon and got a crack right as we broke all the way through, but we patched it with a piece of plexi. I don't know how i feel about siliconing real rocks to the glass like he did, seems like alot of weight to be attaching like that.