Dymax GS Aquarium Series 5-in-1 Nest Tank (Set of 5)

Low-iron glass from Dymex, also known as optically clear glass, is a type of high-clarity glass made from silica with a very low iron content. This low level of iron reduces the bluish-green tint that can be seen, especially in larger and thicker sizes of glass. This specific type of glass is not typically used in standard applications where clarity is desired.