My Results

To measure algae growth, I used a cytometer to measure density based on transmittance. The lower the transmittance level the higher the algae density.

PBR                        Transmittance Level
Green                              52.2
Orange                            56.4
Yellow                             62.0
Blue                                 68.4
Red                                   72.8                                                                       
Control (Clear)                 75.6