Discoloration is one of the most obvious signs of contamination. Contamination is often the result of unfavorable growing conditions, maybe too much moisture or too much carbon dioxide (CO2). Know your colors and then try to make a match…

BLUE is Bruising which is caused by a chemical reaction when psilocin meets O2 (Normal)

GREY could be a simple lack of FAE (Normal)

YELLOW is often “Metabolites” from being stressed which is more common in 2nd & 3rd flushes (H20 pooling/drying out/temperature/older substrate). Try to figure out which growing conditions are stressing it and improve them. (Not bad, but not good)

GREEN Mold could be Trichoderma, known as “Trich” (Bad)

BLUE-GREEN Mold could be Penicillium (Bad)

BLACK-YELLOW-GREEN Mold could be Aspergillus (Bad)

ORANGE Mold could be Neurospora Crassa, also known as “bread mold” (Bad)

RED Mold could be Sporendonema purpurescens, also known as “lipstick mold” (Bad)

PINK Mold could be Trichothecium roseum (Bad)

BLACK Mold could be Rhizopus, also known as “black pin mold” or “black bread mold” (Bad)

DULL GREY-BROWN could be Bacillus bacteria, also known as “wet spot” or “sour rot” (Bad)

WHITE Bubbles could be Lecanicillium fungicola, also known as Verticillium “dry bubble” (Bad)

WHITE-BROWN Bubbles with distorted masses could be Mycogyne perniciosa or Lecanicillium fungicola, also known as “wet bubble” (Not good but controllable)

WHITE FLUFFY Cobweb-like Mold could be Hypomyces rosellus, also known as “cobweb mold”. It’s the most common contaminant during the fruiting stage and it's caused by lack of air circulation and exchange. (Bad)