Constructed of low iron glass with a 91% light-through rate, the view from this 4-gallon high clarity cube is outstanding. This desktop cube is ideal for a planted nano tank or to create a home for tiny creatures such as micro shrimp, snails, guppies and of course the fabulous fighting betta. The workmanship on these high clarity glass cubes separates the series from ordinary fish tanks. There are no plastic frames to obstruct your view and each unit has polished beveled edges for a higher aesthetic balance. High-grade German silicone bonds the cubes tightly yet matches the glass to give the cube a truly seamless appearance.