Flipper DeepSee Nano, is a magnetically attached optical magnifier for viewing distortion-free details in your aquarium. Held to the glass by powerful magnets, the DeepSee Nano magnifier can be positioned anywhere in your aquarium to magnify the area of your choice. It has an optical-grade lens with 3 to 4 times magnification at optimized focal lengths, which is perfect for photography or detecting early signs of disease or parasites in your aquarium.