Oligotrophic lake
Deep, clear lakes with low nutrient supplies. They contain little organic matter and have a high dissolved oxygen level.
Source: Corrosion-Doctors.org
Wikipedia: https://en.wikipedia.org/wiki/Trophic_state_index#Oligotrophic
Deep, clear lakes with low nutrient supplies. They contain little organic matter and have a high dissolved oxygen level.
Source: Corrosion-Doctors.org
Wikipedia: https://en.wikipedia.org/wiki/Trophic_state_index#Oligotrophic
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