Usually people (that can do this) do a short blackout period with some type of bacterial med. Since it's a photosynthetic algae it can't use light for food, and since it's a bacteria.. well you know
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Sigh, we're studying this in biology
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If you put "u" instead of typing out the actual, shocking, three letter word... i'm not going to read your ramblings.
I'm so behind it's not even funny.