Advanced Acrylics has constructed a sleek, clean, and smooth-looking quality reservoir for water top offs made from 1/4" cell-cast black acrylic. It's built with beveled edges and has a clear front panel to monitor the water level and ensure you don't run your pump dry. The Advanced Acrylics Reservoir will be a great addition to your reef system if you're looking for a slim reservoir for those snug and compact sumps. Its added convenience is that it fits all ATO pumps with the integrated hinged flip-top lid with a knob for your easy refill needs, and it conveniently has a 1.25" hole for tubing and cord placement. If you want to make the hobby as easy as possible, the Advanced Acrylics Reservoir will be an added advantage for no more manual top-offs.