Heart failure patients mostly come to the hospital because of problems with too much fluid in their lungs or legs. This occurs when their body does not respond to the water pills they are taking. The water pills are also called diuretics. The water pills are supposed to stop the build-up of fluid. When patients come to the hospital with too much fluid, they can be given a liquid diuretic. The liquid diuretic is given with a needle into a vein in the arm. This is called IV injection. Treatment with this liquid diuretic can work very well to remove fluid from the body and is the standard of care treatment. The response from person to person may vary. However, some people do not respond to this injectable diuretic very well. There is another way to remove the extra fluid from the body that does not use diuretics. This method is called Aquapheresis therapy. During the therapy, blood is passed through a filter. A little bit of water is removed or filtered over a period of time. This filtration occurs no matter if a patient is resistant to the water pills or not. This method is also called blood filtration or ultrafiltration. This study will compare these two different ways to remove the build-up of fluid.