The Trigger Systems Ruby ATO 5 Gallon is an essential auto top-off reservoir designed for saltwater reef aquariums. This crucial piece of equipment automatically replenishes evaporated water, ensuring consistent water levels and stable salinity within your display tank and sump. Maintaining a stable environment is vital for the health and thriving of corals, fish, and other invertebrates in a marine ecosystem. Crafted with precision, this 5-gallon capacity ATO reservoir features compact dimensions of 6 inches long, 14 inches wide, and 15 inches tall, making it suitable for various setups. It includes two 0.25-inch OD hose ports for easy plumbing, a fitted lid to minimize evaporation, and a dedicated opening for wires and hoses. Constructed from durable 1/4-inch thick material, it is engineered to prevent bowing, and its subtle laser engraving marks the water level, complemented by a rounded and polished top for a clean finish. This ATO reservoir is ideal for any reef hobbyist seeking to automate their daily water maintenance and ensure optimal tank stability. Perfect for those with busy schedules or anyone wanting to reduce manual top-offs, it provides peace of mind by preventing salinity swings that can stress delicate marine life. Its robust build and thoughtful design make it a reliable and aesthetically pleasing addition to any high-end saltwater aquarium system.