Bashsea Signature ATO 10 Gallon Assorted Colors is a versatile, multi-purpose reservoir designed for auto top off, dosing, or refugium use in aquariums up to 400 gallons. Built with commercial-grade materials, it features a laser-etched viewing panel and a light-blocking design to reduce algae growth. Bashsea Signature ATO 10 Gallon Assorted Colors includes a fitted lid, dual dosing ports, and cord management for a clean setup.