I am so sorry Mary,
My uncle had one of the 1st j pouches, due to FAP, done at the Mayo back in the 80's. In the late 90's was diagnosed with kidney disease and by 2000 was down to 30% function.
They gave him 6 months.
He burried 3 nephrologists...litterally...he passed at age 86 last year from diabetes related infection...over 16yrs after the diagnosis. His kidneys were still going strong.
I was constantly after him to drink more fluids and water...he would drink highly diluted juices, particularly cranberry juice. He had a very limited diet due to both disease but kept his energy up with soups.
Before every meal he ate a homemade soup...threw everything in the bottom drawer of the fridge into a pot, added water and let boil...made some very interesting creations...would add a bouillion cube for salt and extra flavor...
Not sure if this could help you but it is worth a try...if you are allowed to then add a lot of fresh herbs (parsley, cilantro, chives...), they give you a lot of trace minerals that we lose (or do not hold on to) due to our pouches.
I use veggies like zucchini, potatoes (potassium), tomatoes (potassium), onions and garlic as well as leeks and herbs.
I use meat bones or chicken bones to give it more flavour...I know that it might sound stupid but it gives the body both hydration and vitamins...
Just a thought.
Sharon