3 day(+?) water fast for weight loss?

Hello again r/fasting!

I've had 2 great weeks of daily intermittent fasting anywhere from 16/8 to 20/4 depending on the day. I've lost a little less than 1kg each week and am loving how I feel and the results.

I've read some posts on here about the amount of weight people lose (and keep off?) with extended water only fasts. Is this a feasible option to lose weight a bit more quickly? I have about 20lbs to lose and would love to see more off it drop off quickly. I've failed at diets in the past because of not seeing results.

If this is a viable option, how often could/should I do a 3+/- day water fast? 2x a month?

Thanks!