Special Introductory Pricing: SAVE 25%! NUVO INT Internal Overflow Aquariums: Customize It Your Way! The INT's internal overflow system has the industry's first Trapezoid Infinity Overflow, dual return LOC-LINE nozzles and a custom "Bean Animal" style safety drain system. INT aquariums have ultra-thick low iron glass, laser-cut acrylic weir, and distinct black silicone lines. A Pro Series Screen Lid, self-leveling rubber mat, drain assembly, and return hose assembly are all included. Choose from 50, 75, and 100 gallon models!