There are several ways to bond two acrylic sheets together, but when using acrylic to build aquariums or fish tanks we'd recommend using a method known as 'One-Site bonding'.  Our project managers work closely with construction companies, contractors, and other industry professionals to effectively and efficiently bring the project to completion following our proven important steps. When joining two sheets side by side, use an applicator with a narrow nozzle to apply acrylic cement on both of the edges and hold them tightly together with clamp.