Hi
I have found some usefull info on this site about the thickness of glass in a tank. and have been wondering if any one knew what was required for a tank that is not all glass. 3 meters by 3 meters by 2 meters with four 1500mm by 500mm windows. I was thinking of having a wooden frame lined with fibre glass. but i can think how i would seal the windows on or whats safe or not.