Hi Sia Meng,
I was told spirulina was a good food for the brine shrimp. I went shopping and I gave up because all the spirulina I could find was more expensive than the brine shrimp. So I used the green foam found on the water surface of my Discus tank and the BBS seem to like it.
I haven't cultured them to maturity, but it sounds rather time consuming, but definitely parasite free. Will look out for your write-up.
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