The Flipper DeepSee Magnetic Aquarium Viewer 4" offers advanced magnification and clarity for aquarium enthusiasts and photographers. Featuring an optical-grade magnifying lens and a 4-inch viewing portal, it provides an optimal focal range of approximately 3 to 8 inches, allowing for detailed observation and photography. Secured by strong rare earth magnets, it can be used on tanks with up to 5/8-inch (16mm) thickness, ensuring stability and versatility. With its ability to move easily around the tank, users can view their aquarium from various angles with ease. Additionally, the DeepSee is designed to be safe for both glass and acrylic tanks, making it suitable for inspecting reef corals, fish, and detecting early signs of disease or pests. Whether for hobbyists or professionals, the Flipper DeepSee enhances the underwater viewing experience, offering precision and convenience for aquarium enthusiasts of all levels.