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- Nov 19, 2019
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- West Yellowstone
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- Montana
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Sorry. Looks like I forgot to post the pics.What color do they appear when the LEDs are on? I have read that they can look almost a brownish color but I have never seen any in my experience. So far I have only seen Diatoms, hair algae, film algae, and spirulina (had mistaken it as cyano until I performed the H2O2 test).

