Glad to hear you're on the mend. I have MS symptoms too and find it's a surreal experience! Very weird.
The brand of Chlorella is All Seasons. I've heard Chlorella recommended for chelation quite often. I don't burp up any taste but am feeling rougher. As I said I don't know if it's down to it because I get times when I feel worse regularly. If I phone them and ask they're bound to say it doesn't contain mercury.
On the bottle it says it's 100% pure chlorella, no binders, fillers or addatives and that it's cracked cell wall. I don't know if any of this is relevent but am not sure how to find out if it's ok.