These reservoirs and lids are designed for simplicity in maintenance and performance. Each reservoir has a specially designed lid (optional) containing an access port (optional) and a raised grip porthole cover. This standard option allows the gardener easy access to the reservoir without taking the entire lid off, ensuring a more functional routine of adding solutions, nutrients and water. A great addition to a hydroponics garden, this durable 70-gallon White Reservoir is easy to clean, made of UV-resistant ABS plastic and measures 54 in. x 31 in. x 12 in.