Quick question...how do tanks break when you're using it as a transport tank? To my knowledge, when a tank is set on a flat surface, the glass isn't placed directly on that surface anyway. The plastic edges keep the bottom of the tank suspended right? Correct me if I'm wrong. Also, I use those submergable heaters that come with suction cups, sometimes those suction cups lose its suction, so I need to press it against the glass, then slide it up and down to get all teh air out of it, then press a litle harder again to make it stick. I place the heaters toward the very edges of the glass, how much damage would that cause?