I'm not sure of the equation, can anyone tell me the litres in this tank? And to make it worse the measurements are in inches.......L=29,H=15, D=15. I've been given this tank but haven't picked it up yet. The measurements tell me it's not very tall so what would be good to keep in it, I'm thinking maybe a couple of feature fish, some great plants and a good size school of small tetras? any suggestions?