PRAL alkalinity level while water fasting

Hi,

When doing a water fast, my PRAL alkalinity goes down fast if I add minerals to my water (magnesium, potassium and calcium). Should I try to stay around -30 on the ratio ring by limiting my electrolytes even if I don't get my daily needs ? Should I get my daily requirements even if I'm really low on the ratio ring ( around -90 ) ?

I don't want my body to be in an alkalosis state.

Thank you