i recently stumbled upon a youtube video where a guy was building a 3x2x2. he mentioned using caulk to seal the inside of the viv. is this necessary to do? and if it is, how does one make the caulk look flat? most of the pics i have seen of others builds the caulk was super chunky. i would LOVE for the one i build to look nice on the inside... oh, and he used melamine for building this...