I'm new to the forum so thank you for any help you can offer. How bad is my idea of using a piece of 1/4" acrylic, or any thickness for that matter, to repair the bottom of a tank. There is some crazing in the bottom acrylic piece which may be the source of a leak and my thoughts are to laminate an over-sized piece of acrylic, overlaying the crazing by a couple of inches using Weld-on. In my mind, the fusion the Weld-on creates between the tank bottom and the new laminate should seal the crazed area off from water intrusion in much the same way as a patch on an inner-tube does.