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Here's a few articles which may be of interest:
http://reefkeeping.com/issues/2005-05/eb/index.php
http://www.wetwebmedia.com/bluegralgae.htm
http://reefkeeping.com/issues/2006-11/rhf/index.php
http://saltaquarium.about.com/cs/algaecontrol/a/aa091100.htm...
You haven't ruined it, but you will have to determine how much to dose, without the aid of the BRS calculator. I would add about half of what you think is appropriate, and test before adding any more. Once you have done this a few times, you should get an idea of the amount to dose with the...
Really nice job George, awesome. Did you ever consider using a hatch spring to prop the canopy door open?
http://www.boatersworld.com/product/MP80814226.htm
You could also put it on a timer and run it at intervals, i.e. on for an hour/off for an hour. Also, make sure your flushing the GFO before you start to run it in your system.
Many reefers are using some type of carbon dosing, either solid, in the form of bio-pellets or liquid, in the form of either(or a combination of): Vodka, Sugar or Vinegar. Vodka for its ethanol, Sugar for its sucrose or Vinegar for its sodium acetate. The article below deals with Vodka, and...