Im sorry if i derail here, but i did use fiberglass in the whole bottom on my tank, there is a leak, the water comes out in a area of 40x40cm in the bottom, varius places there.. Im not sure if the leak actually is there, but since the is no sign of water anywhere else im thinking there is a cracking around that area.. Would anxtra layer of fiberglass\epoxy eliminate the problem, or will it just crack in flexing? (like the first layer probably did.) The leak is so frikking small, its like 1dl a 3 days at max. And at a certain level(probably preasure).