BRS Bulk GFO Granular Ferric Oxide - High Capacity

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  • Remove phosphates from your tank with Granular Ferric Oxide

Quick Overview

Why does BRS recommend this?


Phosphates are going to be one of the biggest battles we have with a reef aquarium.  The BRS GFO works even better in reactors due to it being denser than most other GFO.  The price is just about double of standard GFO however you only need to use half as much which equals out in the long run.  High Capacity is going to have less dust than almost all other GFO on the market and being able to buy it in bulk saves a ton of money.


High Capacity GFO is the best performing GFO we stock and capable of removing close to twice the phosphate as standard GFO by volume. We recommend this when you have a large tank or limited room in your media reactor.


Granular Ferric Oxide (GFO) removes phosphate from the aquarium and is one of the most commonly used filtration media used in the aquarium industry.  GFO is one of the few ways to easily maintain ultra low phosphate levels on a consistent basis. Maintaining these ultra low levels will help prevent algae outbreaks as well as treat existing algae issues. Your aquarium's glass will also stay clear and free of the green hue significantly longer. GFO is most commonly used in a media reactor like the BRS reactor or media bag.


Phosphate inhibits proper coral growth by incorporating itself into the corals skeletal structure which makes it difficult for the coral to grow by laying down additional calcium and carbonate (alkalinity) ions. Maintaining ultra low phosphate levels will increase the growth of any SPS or LPS coral.


Algae outbreaks are one of the most common reasons for a complete tank shut down. We recommend preventing them by maintaining an ultra-low nutrient level environment where it would be difficult for them to get out of control to begin with. It is much easier to prevent outbreaks than it is to treat existing outbreaks.

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  • Quick Overview

Why does BRS recommend this?

Phosphates are going to be one of the biggest battles we have with a reef aquarium.  The BRS GFO works even better in reactors due to it being denser than most other GFO.  The price is just about double of standard GFO however you only need to use half as much which equals out in the long run.  High Capacity is going to have less dust than almost all other GFO on the market and being able to buy it in bulk saves a ton of money.

High Capacity GFO is the best performing GFO we stock and capable of removing close to twice the phosphate as standard GFO by volume. We recommend this when you have a large tank or limited room in your media reactor.

Granular Ferric Oxide (GFO) removes phosphate from the aquarium and is one of the most commonly used filtration media used in the aquarium industry.  GFO is one of the few ways to easily maintain ultra low phosphate levels on a consistent basis. Maintaining these ultra low levels will help prevent algae outbreaks as well as treat existing algae issues. Your aquarium's glass will also stay clear and free of the green hue significantly longer. GFO is most commonly used in a media reactor like the BRS reactor or media bag.

Phosphate inhibits proper coral growth by incorporating itself into the corals skeletal structure which makes it difficult for the coral to grow by laying down additional calcium and carbonate (alkalinity) ions. Maintaining ultra low phosphate levels will increase the growth of any SPS or LPS coral.

Algae outbreaks are one of the most common reasons for a complete tank shut down. We recommend preventing them by maintaining an ultra-low nutrient level environment where it would be difficult for them to get out of control to begin with. It is much easier to prevent outbreaks than it is to treat existing outbreaks.More

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BRS Bulk GFO Granular Ferric Oxide - High Capacity

99% Recommend this to a friend (188 of 189)

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Product Questions

will this product leach phos back in the tank?
Question by: Eddie on Apr 21, 2014 5:05:00 PM
Hi Eddie,
It will not release back phosphates under aquarium conditions.
Answer by: Bulk Reef Supply on Apr 21, 2014 5:05:00 PM
How much do u start out with in your reactor? Is there a measurement per gallon ratio?
Question by: Brandon on Oct 4, 2013 12:46:00 PM
Hi Brandon,
It depends on how large your tank is. The easiest way to do the math is to use our reef calculator at the link below. You enter the size of the tank and the type of GFO you want to use, it will tell you how much GFO to add.

http://www.bulkreefsupply.com/reef-calculator
Answer by: Bulk Reef Supply on Oct 4, 2013 12:46:00 PM
what is the amount of GFO HC you would normally run in a 120 gallon reef?
Question by: Skopp on Oct 15, 2013 3:19:00 PM
They there,
For a tank that size you would want to run 1 cup of GFO. The easiest way to do the math is to use the BRS Calculator right here:
http://www.bulkreefsupply.com/reef-calculator
Answer by: Bulk Reef Supply on Oct 15, 2013 3:19:00 PM
Can the HC GFO tumble more than the standard, higher flow? I am also using the filter pads on the top to help keep the particles in better. Your thoughts would be great.
Question by: Chad on Jul 7, 2014 2:50:00 PM
Hi Chad,
The GFO HC is a denser/harder product which means it can handle more flow without breaking down (though at the same flow, its tumbling characteristics would be about the same). If you are trying to increase flow you could also remove the sponge pads in the reactor when using GFO.
Answer by: Bulk Reef Supply on Jul 7, 2014 2:50:00 PM
Will this work in a phosban 150?
Question by: Jeff on Nov 29, 2013 9:32:00 AM
Hey Jeff,
It sure will. Its a great combo if you need something that is hang on back!
Answer by: Bulk Reef Supply on Nov 29, 2013 9:32:00 AM
Do you need to rinse the GFO HC?
Question by: Joshua Guzman on Mar 30, 2016 8:09:00 AM
Great question!
It is a good idea to rinse GFO quickly with tank water to wash off any small dust. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 31, 2016 6:47:00 PM
Will this product also remove silicates?
Question by: Ron on Jun 5, 2015 4:34:00 PM
That is a great question!
GFO will help to remove silicates from the water slightly. It sole purpose however is for phosphate removal.
Answer by: Connor (Admin) on Jun 8, 2015 2:10:00 PM
Hi, I have a 150gal. Freshwater African cichlid tank setup. I am interested in buying one of your GFO reactors but not sure which one for my size tank and how much HIGH CAPACITY GFO should I use in the reactor? Also will this help keep down that brown diatom growth on my rocks?? Thank you for your help!! Mark
Question by: Mark on Mar 10, 2016 1:35:00 PM
Great question!
Overall you will use our aquarium calculator to find the correct amount between 2.5 cups for regular GFO and 1.25 cups for High Capacity. With this said you can use a single reactor for High Capacity and a larger reactor would be needed for the regular GFO. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 10, 2016 4:09:00 PM
How many cups are there in the 1/2 Gallon (3.5 lbs.) of HC GFO?
Question by: Adam on Feb 6, 2015 5:36:00 PM
Great Question Adam!
There will be 8 cups in a half gallon container.
Answer by: Bulk Reef Supply on Feb 6, 2015 5:36:00 PM
Does the high capacity GFO have to be tumbled in a reactor or could I place it in a media bag and put it in a high flow area of my sump?
Question by: Kevin on Oct 10, 2013 10:31:00 AM
Hey Kevin,
It is best when tumbled in a fluidized bed reactor as the media otherwise has a tendency to harden into a brick, but even placed in a filter sock would be better then nothing.
Answer by: Bulk Reef Supply on Oct 10, 2013 10:31:00 AM
Can I use the high capacity in a small tank (30 gallon)?
Question by: Scott on Sep 1, 2013 8:58:00 AM
Hey Scott,
There isn't any minimum size limit to the high capacity gfo. It can be used in any aquarium it just happens to be more popular in larger tanks because you don't need as much media. Its handy when your trying to keep the equipment smaller while still maintaining the same effect.
Answer by: Bulk Reef Supply on Sep 1, 2013 8:58:00 AM
hi
Question by: jerry on Apr 1, 2014 2:16:00 AM
Hello!
Answer by: Bulk Reef Supply on Apr 1, 2014 2:16:00 AM

Full Details

Two Types of GFO:

 

  • Granular GFO is varied in its shapes and requires the least amount of flow to tumble. Good for reactors.
  • High Capacity GFO is twice as dense as Granular GFO, so twice as much material will fit into a reactor. It's extremely hard and has less dust to begin with. Fewer fines will be created during use and transportation. By volume, High Capacity GFO will remove roughly twice the phosphate compared to the same volume of Granular GFO. Best overall performance.

 

Special note on fighting existing algae problems: Algae needs three main nutrients to grow: phosphate, nitrate and light. Reducing any one of these will significantly slow down algae growth but may not completely solve your issue. Once algae takes hold, it can be a difficult battle but it is winnable. The best offense against algae is to take preventative measures and attack nutrient before an outbreak is apparent. Use the following suggestions and be aggressive if an algae problem is already present:

 

  • Maintain undetectable phosphate levels with good feeding habits and use a phosphate remover like GFO. 99% of all phosphate is added to the tank via foods.
  • Control nitrate levels by reducing feedings, increasing the water change schedule and maintaining a properly sized protein skimmer.
  • Use nutrient free RO/DI water for water changes and top off water
  • Shorten your lighting period or intensity. In some cases aquarists have found replacing old bulbs that have fallen out of their intended spectrum helps as well.
  • Continuously remove as much algae as possible by hand.
  • Add predators - nothing helps an algae outbreak as much as critters who eat it all day long. Various tangs, lawn mower blennies, crabs and snails are all good options. It is also theorized that a healthy pod population will also control algae growth before it gets a chance to take root.



Note: All Bulk GFO is packaged by weight.

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  • BRS Bulk GFO Granular Ferric Oxide - High Capacity By Ernie on 2/6/2016

    Very good product
  • Good, but not great By Chas on 1/19/2016

    This stuff works pretty well. It rinses clean very easily but it is not removing phosphate as quickly as RowaPhos. It is less expensive and easier to use, so it will probably be good for maintenance, not leaching precipitated phosphate from your rock.
  • Great Product By KEITH on 12/27/2015

    This is one of many products that the saying "you get what you pay for " fits well
  • Love it By Hamburg on 12/14/2015

    works great nice clean water
  • Runses clean By percula99 on 12/7/2015

    I prefer the high capacity GFO because it rinses clean almost immediately. Less messy than regular GFO and really removes phosphate.
  • Magic By randy on 11/18/2015

    BRS GFO high capacity works great on my tank. Nuisance algae is gone since I'm using this brand with BRS dual reactor. Just follow the recommended dosage and you're good to go.
  • Necter of the gods!!! By Reefinman on 11/18/2015

    This stuff is great!! Keeps the algae in check. My tank never looked so good.
  • Worth the money, works incredibly well By Amy on 11/10/2015

    Bought this product to help 'rehab' a neglected tank. Phosphates were through the roof, too high to register with our Hanna checker (over 2.50ppm). Added HC GFO to a BRS dual reactor and saw IMMEDIATE results. Within 72 hours phosphate levels were well below 0.5ppm and still falling.

    Needs no real rinsing, just let the first little bit of water that leaves the reactor flow through some floss and a filter sock, to collect the fines (or discard the water). Tumbles beautifully in a reactor, we've had no issues whatsoever with clumping or pieces breaking down into fines.

    Lastly, when compared to regular GFO, this stuff is denser; at first glance it looks WAY more expensive, but compared by weight it's not a huge difference and it's worth it. We use regular GFO for maintaining non-problem tanks, but if you have a high-load tank, you're dealing with a major phosphate issue, repairing long-term neglect, it's worth laying out the cash for this stuff -- it's not a gimmick, it definitely works more intensely than the standard GFO.
  • Highest quality GFO I've ever found By Adam on 11/9/2015

    No clumping, huge capacity, easy to work with, and keeps my phosphates in check like nothing else I've ever used. I really can't say enough about this product other than it is the best I've ever found. Period.
  • BRS Bulk GFO Granular Ferric Oxide - High By steve on 9/6/2015

    nitrates were high 10ppm then two weeks later 0ppm wow You need to get this now.
  • Works as advertised By Mrod on 7/28/2015

    Very satisfied as it works as others have mentioned. My Phosphates were always a struggle with a nano tank and no skimmer - this is the first media to actually make a noticeable difference,
    Gradually coming down each week and happy with the results thus far!
  • Excellent GFO! By Pegasus on 7/27/2015

    I started with BRS HC GFO, and if the day comes, I will end with it as well. Rinses clean almost immediately, and does an outstanding job of removing PO4. Levels stay near-undetectable, even with my heavy feeding habit. IMO, it's worth the extra cost to not change it as often. 15% water changes every two months of so, and my fish and corals are thriving! Highly recommended product!!!

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