All that spirulina does for me, is gives me weird liquidish funny smelling oddly coloured poop. Besides, cyanobacteria = soylent green, soylent green...
This ^ while fish is yummy, it's way too expensive unless you are going out and catching it yourself. I love me some fish but it's 8-20$ a pound here...
I've been using it, haven't noticed a difference in my sleep (I also got some orange safety glasses that filter out blue, I put them on about 2 hours...