I'm 90 and suffer from CHF due to leaking of the mitral valve. This condition plus my A-Fib results in a build up of fluids in my right lung that I have to have needle aspirated about every 6 months. Last time 1.2 liters were removed. I have to walk an extremely fine line on my water intake. I take Furosemide and if I drink too much water my lung fills faster and my symptoms of breathing difficulty and phlegm buildup increase dramatically. If I drink too little my colon dries out and my stool becomes hard and dry and results in chronic constipation which I have to treat with powerful laxatives such as enemas or suppositories or a trip to the ER. My Dr. says I should take just enough water to keep my colon wet so my stool is soft but won't tell me how much that is. I presently take 36 ozs. of water per day and have to take a cap of Miralax daily and am trying to find the right amount. HELP. Need advice.