No amount of water makes the metallic taste in your mouth go away, just get used to mouthwash a lot. The taste was still a good way to see if you threw yourself out of ketosis or not.
I saw dramatic results with keto-type diets and carbs<50 grams. I might do this again in May and be better about refeeds. If my salads and greens put me over 80 grams of carbs, I was out of ketosis, and for most people, the mark tends to be 90 or 100 grams of carbs. It takes me about 3 days to get back into ketosis so I may do 10 day cycles instead of weekly ones.
The bad part was I had poor energy all the time, body was very sore from lifting and soreness took longer than usual to get over. And of course, I didn't incorporate carbs back in a moderate way so a lot of progress became fluffy again.