1. Feb 26, 2013 #21
   Des Moines, IA

   Chris C. Experienced Reefkeeper

   1,236

   Des Moines, IA

   Ratings:

   +46 / 0 / -0

   I would highly recommened using the Bulk Reef Supply GFO calcultor. I think it would tell you 22 tablespoons, but I would verify that.
   
   You shouldn't do it all at once though. You should increase it slowly.

    
2. Feb 26, 2013 #22
   

   Andy The Reef Guy Inactive User

   2,581

   Ratings:

   +0 / 0 / -0

   Also remember, if your phosphates are already elevated the gfi you put I now will be cashed in about 72 hours

    

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