The Planted Tank Forum - View Single Post - biofilm problems
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Old 01-14-2013, 12:40 PM   #17
Waters
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The film in my tank actually has nothing to do with the fish food. It seems anytime I add new live plants to the tank the film gets bad for several weeks. It was almost completely gone until I added some new swords...within 2 days it was back twice as bad.

To answer the question as to why to remove it (besides looking bad), it blocks a lot of the overhead lighting.
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