here goes...whilst listening to a bit of 80s/90s rock i took out 20ltrs of water whilst siphoning the mess off the sand,squeezed sponges, then used fish net to get remaining mess out(making water cloudy) ..before adding fresh dechlorinated water,i rearanged my grassy type plants(wot a nightmere)being bored i measured tank.....W=12"..H=15"..L=31"...=80ltrs...i know its small compared to most....now putting oven on for kids teas...... and the kettle....have a nice day