Yes I too believe that selenium can displace mercury, because I've gone through it too. Not chelate it exactly, but if it competes with it for binding sites, then maybe that can happen...however it can also help symptoms too. It binds it up apparently too somehow. I'm confused, but I know it can cause some dramatic symptoms in mercury toxic people that feel very suspiciously like detox symptoms or mobilisation.

I don't know about Spirulina, I don't remember it did much to me with my metals....it's possible since it's an algae, but they too can be contaminated. Chlorella must also be from a pure source. Chlorella is much more powerful with metal than spirulina in my opinion.