I have a tank and I am not exactly sure on its capacity. Now I know how to calculate the volume of simple objects, but this isn't the average rectangluar aquarium. If you have a look at the pic, you see what I mean. I need to know the the volume in (US)Gallons so I can be sure this would be suitable for a bimac and so I can get the corrisponding equipment. Any info or ideas on how to do this would be appreciated. Also if you know the answer please explain because I am curious to know how it is done. Thanks!