thedocta
Member
Well there can be a number of causes...stress cracks are a big one. In shipping, in the car, when setting up the tank, or a number of other times your tank might get a stress crack which is a little crack, usually at the seams of the tank. Those will grow due to big temp differences between the air temo and water temp. Also if the tank is on a surface that isn't level you will almost definately get a crack over time. Another reason is liverock leaning against the glass. And the last main reason is when people move the tanks with lots of LR, LS, and water still in it. I've done my best to avoid all of these...emptied the tank almost totally when I moved it to it's final location, leveled the desk it's on, and was carefull to not bump, drop, or do anything that would cause a stress crack.