Research showed her that plants have impressive water purifying properties, so Lee began searching fresh water bodies around Greater Victoria for an algae that would meet her requirements. At Swan Lake, she found what she was looking for – Azolla filiculoides is an invasive macroalgae known to exist in fresh water bodies around the world and to have absorbing and purifying properties. A study conducted in Iran in 2014 showed the algae could yield up to 58,700 litres of oil per hectare, or about 23,765 litres per acre. The oil can then be used in a biodiesel blend.