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by hbates 1489 days ago
The liquid in the container would contain medium that contains chemicals that the microalgae need. Heres a common medium recipe BG-11 https://utex.org/products/bg-11-medium

Carbon is captured through photosynthesis and is stored as biomass. But when the microalgae dies the carbon is released again. So to truely store carbon the microalgae needs to be cultivated and buried / contained.