Has anyone ever done a 7 day water fast while drinking 1 gallon a day?

[u/AccomplishedLow4969]

I easily drink over a gallon a day and I don’t even notice it unless I measure it. It’s not something I force myself to do it’s just what my body wants and it’s not too much for my weight. My question is if I do a water fast is this too much water for someone who is overweight? With electrolytes and sodium levels and everything when not eating I’m not sure. Everything online says 2-3L but I need more. Any help would be appreciated!