Starting my first 3 day fast

The longest I’ve lasted is 40 hours. I’m 25 hours in. I read that 72 hours can reset your immune system which I desperately need. I’m doing water only. No tea,coffee, electrolyte packets etc I’m confused how much Himalayan salt I should take each day. I read 2.5 teaspoons? Is that throughout the day? And about how much water? I weigh 145lbs female. I’m so hoping I can do this! Thank you 🙏 via /r/intermittentfasting https://ift.tt/rZvJ3BL https://ift.tt/JE3cpsM