Sorry, I accidentally posted in the wrong forum-Miscellaneous instead of here previously. Hi Dr.Cath , I recently started growing spirulina at home and I’m interested in how much fertilizer I can dissolve in water and therefore get a higher spirulina yield without getting negative effects. I think the biggest problem is the density itself against the light reaching the Solution and I wonder if I need to keep other factors in mind like pH when attempting to get a bigger yield? I think I can overcome these problems by having a light source from multiple directions? Am I right and is this kind of setup possible? If so then what is the biggest yield I can expect to get from this setup?