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					Originally Posted by makana  The tank is roughly 4 years old as is the rock.  There are currently two types of nuisance algae in there.
 Any ideas on what I can do?  Throw in the towel?
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 I'm not sure if they make towels that absorb nitrates.  Wait, do they?  That would be totally awesome!!
Anyway, have you considered trying 
BioPellets in a reactor?  If set up properly they can do a great job at reducing nitrates.
..seriously do they make nitrate absorbing towels?