I am using 3N BBM broth media in a 250 ml flask for unicellular green algae cultivation. Which condition is very good for faster algal growth? How much days will take for good growth?
For 250ml flasks, I use 100 ml media, fluorescent lighting at ~40 µmol photon, 25-27C, 120-150 rpm (or daily shaking by hand). Using less media generally produce faster growth as it gives a larger headspace for better aeration. For large flask, e.g. 2.5-3L flask, I pump filtered air in; occasional shaking or no shaking required.