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Old 02-16-2013, 04:51 AM
Caine Caine is offline
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Join Date: Sep 2012
Location: Calgary, AB
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Sounds like black beard algae.

Seachem Excel is a Glutaraldehyde based antibacterial agent that is also a mild algaecide as well as a liquid carbon source that plants can use in place of CO2. Do as much manual removal as you can and dose Excel. The algae will hate it and your plants will love it and the shrimps should be indifferent towards it.
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