Table 3. Effect of unmodified synthetic seepage, synthetic seepage with Mn, Br and Sr added, and mine seepage on growth rate of Chlorella sp.

Water type	Chlorella sp. growth rate (doublings/day; mean ± SEM)
	By electronic counter	By microscope
Control (Magela Creek water)	1.55±0.02	1.53±0.05
Unmodified synthetic seepage	1.54±0.03	1.73±0.04
Synthetic seepage + 220 µg/L Br, 440 µg/L Mn and 1400 µg/L Sr	1.54±0.01	1.83±0.11
Mine seepage	1.05±0.02	1.03±0.08

Results are presented based on both electronic cell counting (Coulter Counter) and microscope cell counting.