The Planted Tank Forum - View Single Post - Brown killer algea! HELP
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Old 03-18-2013, 02:33 AM   #2
latchdan
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Its black beard algae, remove most by hand/toss bad stuff. Spot treat with excel/Hydrogen peroxide. Increase Co2 if possible/ add DIY. Or you can try this method but make sure to read entire page fish death/invert death may happen.

http://www.plantedtank.net/forums/sh...ighlight=punch
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