Father in hosp with CHF and fluid in lungs

Hello, my father is 67, diabetic since 1995, high blood pressure, some kidney issues, mild dementia, and now chf with fluid building up in lungs.

He first was admitted on the 18th of May due to critically low sodium. That was when he was dx with chf. His kidneys are functioning at about stage 2 failure. While in the hospital on the 22nd of May they drained his left lung and it had over 2 liters in it. The 23rd they drained the right one, and it had almost as much. Evening of 23rd he went to rehab for physical therapy from 23 thru 31st. They were not giving him enough insulin for his diabetes while there, and we kept telling them that his sugar was far too high, and putting too much stress on his organs by not giving him enough insulin. His readings were typically 245-385. On May 31 he had a small heart attack, and dx with high potassium, which I know can be from not getting enough insulin. He also lost vision that evening in his right eye. Dr said it's permanent vision loss due to glaucoma and new blood vessels behind that eye. Left eye seems to be ok at normal pressure, but there are also blood vessels developing behind that eye. :( The largest issue seems to be the fluid in the lungs. The potassium is back to normal, but the lungs are still accumulating fluid even on the lasix. They will be draining the left one this morning as it is 3/4 full. Seems like they plan on sending him home today or tomorrow, without a plan as to try to stop the fluid in the lungs building up. Reading through the forum I found a similar case back in 2008 and Natrum Sulp 6x was recommended. Would that fit this case? Any assistance would be greatly appreciated, thank you!