Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Aqua 20 Gallon Tower Triangle Aquarium Kit
Product description: T-1200 Features: -Acrylic material. -20 gallon water capacity. -Aqua collection. -Made in the USA. Shape: -Novelty. Water Capacity: -20 Gallons. Water Type: -Freshwater. Product Type: -Aquarium tank. Color: -Black. Country of Manufacture: -United States. Primary Material: -Acrylic. Dimensions: Overall Height - Top to Bottom: -70". Overall Width - Side to Side: -16". Overall Depth - Front to Back: -13". Overall Product Weight: -47 lbs.
Product feature: Unique floor aquarium, Features beautiful panoramic seascapes designed for natural interior, Complete with pump, lighting, extension cord, decorative plants, under-gravel filtration, air pump
Product brand: Midwest Tropical Fountain
Target attributes: Tank Size
Answer: attribute: tank size
value: None
source: None