would recommend to do friend By Bryan on 4/19/14Bryan would recommend this product to a friendGreat product 2 days after adding gfo to aquarium my phosphate dropped to 0. The algae also disappeared from the aquarium also.
Great product By Burt on 4/17/14Burt would recommend this product to a friendI've used pretty much all the major brands over the past several years, and I've got to say this is the best GFO in the industry. Thanks BRS for making a great product, and making it affordable to have a clear tank, also your small particle lignite carbon and is a great product as well.
Pricey but worth it By Matt on 4/17/14Matt would recommend this product to a friendI use it in a reactor and it performs as advertised.
GFO is the way to go By Benjamin on 4/10/14Benjamin would recommend this product to a friendGFO is king for phosphate removal. I run it in a reactor, and it works great!
Highly Effective By John on 4/1/14John would recommend this product to a friendHighly Effective. Make sure you follow the directions. You CAN overdose and your corals will suffer.
GREAT PRODUCT GREAT PRICE By ROB on 4/1/14ROB would recommend this product to a friendHave used this product for years with excellent results!
great stuff at a great price By mario on 3/31/14mario would recommend this product to a friendthis is great stuff at great price would recommend to use in reactor.
why pay more for fancy sounding name? By david on 3/28/14david would recommend this product to a friendworks better than some other phosphate remover. easier to follow dosing directions. no need for a crazy conversion table.
Great value By Dennis on 3/28/14Dennis would recommend this product to a friendLooking for a less expensive alternative to lower your phosphates. You found it. The BRS GFO is a great value for the money, especially for large bulk purchases
Good quality By jacyn on 3/27/14jacyn would recommend this product to a friendGood Guality GFO. A little pricey but I guess thats the norm.
Love this product By Nicholas on 3/25/14Nicholas would recommend this product to a friendthis has cleared my phosphate level. i run GFO and a fuge with Chaeto and it is doing wonders for my tank!!
works perfect By ELIAS on 3/25/14ELIAS would recommend this product to a friendnice product to remove phospates, you see the difference instantly.
Ask a Question About 'BRS Bulk GFO Granular Ferric Oxide'
Previously Asked Questions
by Jeff on January 2, 2014, @4:49 PM
How many cups in a pound of the BRS GFO?
Bulk Reef Supply Hi Jeff,
There is 4 cups in our 1lb container, 8 cups in the half gallon/2lb container and 16 cups in a gallon/4lb container.
by michael on September 9, 2013, @1:58 AM
Should GFO be changed just as often as Carbon?
Bulk Reef Supply Hey Michael,
GFO should be changed when it is depleted. How long this takes will depend on the amount of phosphate that is added to the tank. A pretty typical tank that would usually be 4-6 weeks or so but the best way to tell is to monitor the phosphates. When they start to increase that would indicate that DI resin has reached its capacity.
by Paul on November 27, 2013, @10:19 AM
Sorry I didn't see the instructions, can you tell me how much I will neeed to use in your BRS reactor and how long between changeouts? I have a 90 gal tank and soon to be 125
Bulk Reef Supply Hey Paul,
The easiest way to know is to use the reef calculator at the link below. You just enter the size of your tank and it will tell you how much to run. In the case of your 90g thats about 1.4 cups (22 tablespoons). How long it lasts depends on how much phosphates you add to the tank (which is largely a matter of how much you feed). Pretty typical is 4-6 weeks though.
by James on November 19, 2013, @7:22 AM
I want to mix GFO with carbon in the BRS single reactor. Is it OK to use the cheaper GFO to mix in with the carbon or do you need the high capacity GFO? I have a small system so I use low quantities of both carbon and GFO in my reactor. I was just worried about the regular GFO being too small.
Bulk Reef Supply Hey James,
It doesn't cause any issues with the reactor to use standard GFO. Really the choice just comes down to the volume of space you have to work with. If you have a large tank you may need more regular GFO then will physically fit in the reactor. Then you either need to get a larger reactor, or use the HC GFO which only requires half the amount.
by John Lasky on March 1, 2014, @11:28 AM
starting a 90 gallon . will also buy your reactor , how much product do I need to start out to fill the reactor. Thank John
Bulk Reef Supply Hi John,
The amount of media depends on the size of your tank with the maximum capacity of the reactor being 2 cups of media, though fortunately with your size tank you wouldn't be in excess of that. For a 90g tank you would use 1.5 cups of media. The easiest way to get measurements for most of these products is to use the BRS Calculator which can be found right here:
GFO comes in two types:
- 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 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 many 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 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 of a phosphate remover like GFO. 99% of all phosphate is added via foods added to the tank.
- 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.
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