This thread reminded me that I actually had an issue with my iron on that float test thing few donations back, they did a further test and everything was normal there so went ahead.
Never issue since then and even had my iron check via a private blood test with everything being tip top, wonder if it was just a "faulty" solution.
Never issue since then and even had my iron check via a private blood test with everything being tip top, wonder if it was just a "faulty" solution.