A patient presents to the ER with lower extremity edema, PND, dyspnea, and orthopnea. He has rales halfway up his lungs. He has been on a stable dose of Lasix for months, but as the fluid overload and edema worsened, his primary doctor told him to change his 40 mg of furosemide twice a day to 80 mg of furosemide once a day. He explains that the furosemide seems to make him urinate for a few hours but he is still having trouble breathing, he is gaining weight, and the edema has not improved. Which of the following would not be an effective strategy for dealing with his fluid overload?