We were hoping to buy tropical fish to re stock my wife's tank 24x12 x15 inch as its presently down to 2 x 3" swordtails and one x 2" platty, I asked for 6 x neons & 1 x cory catfish. She asked me for the litre capacity of the tank, I didn't know off the top of my head but gave her the tank size. She advised bluntly that without the litre capacity she could not serve me with any fish. I would have thought that anyone working in that area would be able to determine the volume from the size I gave, in fact I did it straight away on the Internet when I arrived home (its 70 litres).