Previously Asked Questions

• by CHRISTOPHER on April 8, 2013, @4:04 PM

  How do I prevent the gfo from turning into a very hard solid?
  Chris

  Bulk Reef Supply Hey Christopher,
  GFO will naturally clump up. To prevent this you want to run it in a fluidized bed reactor which will slowly cause the media to move and tumble, preventing the clumping.

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• by Jim on March 10, 2013, @1:04 PM

  How do you determine the quantity of gfo to be used and how often is it changed?

  Bulk Reef Supply Hey Jim,
  The easiest way to to tell is to cheat and use the reef calculator which does all the math for you :-) I will link it below. GFO just needs to be changed when its capacity has been used up. How long that takes depends on how much phosphate you add to the tank. Most people find it lasts 4-6 weeks but if you are adding a bunch of phosphates it will be less and vice versa.
  
  http://www.bulkreefsupply.com/reef-calculator

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• by Linda on January 16, 2013, @8:23 PM

  We are always fighting some kind of algea. Right now GHA has appeared in the tank. Our water tests always test out great and we do a 20 gallon water change every 2 weeks (90 gallon tank and maybe 15 gallons in sump). We use RO water also. Will your product help even though our test for phosphate is 0? I don't use a reactor, so would it work as well in a media bag? Our reef tank (softies) is 4 years old. Thank you.

  Bulk Reef Supply Hey Linda,
  Algae is always frustrating to deal with! I would suggest running the GFO media in a tank now and in the future for a couple of reasons. The first and foremost is that keeping phosphates down will help remove a food source for algae, and that in turn can help keep it from getting out of control. Phosphate also reduces calcification in stony corals, slowing their growth.
  
  When the algae is already established in the tank its not unusual to see the measured levels at or near 0. The simplest way to describe why this happens would be to say that the algae is simply just eating it as fast as it is entering the water. By running GFO you can take some of those phosphates that would be available to the algae away. You can also increase its effectiveness by manually removing the algae, which will allow the GFO to remove more the phosphate that would otherwise be consumed by the algae.
  
  GFO does work best in a reactor as a reactor helps to prevent channeling and will keep the GFO from clumping up or solidifying, though even in a media bag it will be better then not having it at all :-)

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• by tammy on October 15, 2012, @8:56 AM

  how many cups comes in the 1.75 pound jar . thanks

  Bulk Reef Supply It is right about 4 cups.

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• by laura on March 17, 2013, @4:57 AM

  How often should you change out the carbon and GFO media?

  Bulk Reef Supply Hey Laura,
  Carbon should be changed every two weeks. GFO only needs to be changed when it has reached its capacity, this will vary from tank to tank depending on the amount of phosphates that are added but its typically in the ballpark of 4-6 weeks or so.

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