Lee's Specimen ContainerThe Lee's Specimen Container is a clear acrylic box that hangs inside your aquarium, letting you safely isolate a fish or shrimp without moving it to a separate tank. Slotted vents let tank water flow through so the occupant stays in your stable, cycled water and at the same temperature, while staying separated — perfect for acclimating new arrivals, protecting an injured or bullied fish, isolating a pregnant livebearer, or watching over fry.Good to Know: Because it floats in the display tank, the specimen container avoids the temperature swings and uncycled water of a standalone hospital tank — the fish stays in familiar conditions while you keep an eye on it. The flow-through slots keep water fresh; just make sure they're fine enough for the fish or shrimp you're housing (the Small suits nano fish and shrimp, the Large gives bigger fish more room).A simple, versatile isolation box for acclimation, breeding, recovery, and fry — available in Small and Large.