I decided to do a rolling 2 day water fast

I wanted to do a 21 day water fast but I failed so badly you can see it in my previous posts, because my stomach was burning and I understand that I can't go farther than 3 days without dying from heartburn and stomach pain

so I want to do 2 day water fast and then tomorrow 1 keto meal and then again 2 days fast and...

My only goal is losing body fat and weight loss.

any tips? should I consume electrolytes in those 2 days? how much water should I drink because I can't drink more than 2 litres

how long does it take for this rolling fast to show weight loss and size loss?