“…Of the studies that did measure organic compounds in recycled medium (including [15,17,22,23,25,26,37,38,52,61,69,86,89,97,103]), most measured polysaccharides, the most abundant algal exudate, and observed an accumulation [15,22,25,37]. Depraetere, et al [37] confirmed that although polysaccharides in recycled medium inhibited Arthrospira growth to some degree, there were other factors intensifying the inhibition.…”