I've been getting terrible cramps at night again. Cured it last time with Seasalt but forget to take it now.
It does go to show that some of us might be deficient/low in certain electrolytes.
It could be to do with the heel lift and arch supports i'm getting used to, but i will start the salt again just in case, especially as i want to do a pure waterfast again soon, with maybe a dash of lemon juice first few days, for acidiness.