20 tall
From The Aquarium Wiki
20 tall (20T) (sometimes called '20 High' (20H)) is a aquarists phrase used to describe an aquarium tank that holds 76 Litres (20 US G.) of water and is quite 'tall' or high.
This is typically 24" long by 12" deep by 16" high (61 cm x 30 cm x 40.5 cm).
- See 20 long (20L).
- 20 US Gallons is 75.7 Litres.
