Figure 3From: Harnessing the self-harvesting capability of benthic cyanobacteria for use in benthic photobioreactors Media optimization of Phormidium autumnale (CAWBG26). Values represent mean ± standard error (n = 3), * indicates statistical significance (P = 0.0148, Student's t-test). NPK, 20:1:1 nitrogen: phosphorus: potassium ratio; Fe, iron; Ca, calcium; Se, selenium. Earlier time points were also measured (day 5, 8 and 13, data not shown) where there was no significant difference.Back to article page