- Home /
- BRS Bulk GFO Granular Ferric Oxide - High Capacity
Starting at: $24.99
Starting at: $44.99
Starting at: $59.99
I'm sold, will never run without it. By Bruce on 12/14/2014Bruce would recommend this product to a friendWas having phosphate issues on my 90g mixed reef tank so I thought I'd give it a try after reading the other reviews....they were right! I am running a BRS single reactor and mix about 1 part High Capacity GFO & 2 parts BRS Premium ROX Carbon. After a week I was convinced my Hanna Checker was broken because it kept coming up 0 phosphates...there was nothing wrong with my Hanna. Been using this about 6 months now and have had no phosphate issues or no ill side effects. I didn't think I really needed the carbon but carbon is cheap and has it's benefits, and with the mix you don't have the hassle of tweaking the flow to try to maintain the right amount of tumble.
BRS BULK GFO-High Capacity By mt88 on 12/13/2014mt88 would recommend this product to a friendafter 2months battle with algae, system running with algae scrubber, refugium, large protein skimmer, with all that running I decided to install and use this product, never thought it would work but after 5 days came back from vacation things really improved and all my sps corals starting to look happy and fish get to eat a little more food.
Thank you BRS!
Great Product By Evelio on 12/9/2014Evelio would recommend this product to a friendI have used several different types of GFO products and this one gives us the best performance vs cost
Great product By dolpator on 11/23/2014dolpator would recommend this product to a friendThis is the only GFO that I use, it keeps my phosphates levels low to nothing. I use it with BRS media reactor with out issues. Great product would recommend it to any one needing g to remove phosphate in their systems
great product t By David on 10/13/2014David would recommend this product to a friendI highly recommend this product. It keeps my phosphate levels ultra low.
superb media works better than promised By Bruce on 9/8/2014Bruce would recommend this product to a friendI'm running a 360 gallon reef/fish tank, have a couple of large 7-8" plus tangs, and an 8" queen angel, plus some smaller fish
been having elevated phosphate levels, tried other reactors with no real effect,
bought this BRS Jumbo reactor, filled it with the recommended 6 cups of GFO hi capacity and VIOLLA within a WEEK, my phosphate levels dropped from a .90 average, down to a .20 average.... a nice decline about .10 each day.
This media REALLY does the trick
HIGHLY recommended by
bruce in Chicago
Wouldn't be without it. By Gerry on 8/21/2014Gerry would recommend this product to a friendI used to suffer from high phosphates and had unsightly hair algae growing. I tried water changes and scrubbing rocks. I finally tried GFO which worked well, but was messy to work with. I decided to try the high capacity and I will never use anything else again. This stuff is awesome and is very clean to work with. Hats off to BRS for this product.
Does its job, works good both in my wallet and in my tank By DOMINICK on 8/21/2014DOMINICK would recommend this product to a friendDoes its job, works good both in my wallet and in my tank
Keeps PO4 in check By danny on 7/31/2014danny would recommend this product to a friendVery low dust unlike other types of GFO & you use less of it to achieve the same results which reduces stress on your pump. My PO4 levels are around 0.03 ppm using the HANNA CHECKER.
Best GFO on the market By Sean on 5/26/2014Sean would recommend this product to a friendThis is the best GFO I have used before. It lowers my Phosphates better than any other product on the market. The corals have noticeably become more colorful as well. Good product!
Regular vs Hi-Cap GFO By Drew on 5/11/2014Drew would recommend this product to a friendI goofed and ordered Regular GFO instead of the Hi-Cap that I normally order.
YES.... there is a difference.... My Phosphate levels have reacted accordingly.
I have double the PO4 than I normally have when using the Hi-Cap.
High Capacity GFO. By Śruba on 5/10/2014Śruba would recommend this product to a friendI would buy it again because this media works very well for me. Try it yourself and see what I mean.
Thank you BRS.
There are no videos related to this product.
Previously Asked Questions
by Brandon on October 4, 2013, @12:46 PM
How much do u start out with in your reactor? Is there a measurement per gallon ratio?
Bulk Reef Supply 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.
by Skopp on October 15, 2013, @3:19 PM
what is the amount of GFO HC you would normally run in a 120 gallon reef?
Bulk Reef Supply 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:
by Eddie on April 21, 2014, @5:05 PM
will this product leach phos back in the tank?
Bulk Reef Supply Hi Eddie,
It will not release back phosphates under aquarium conditions.
by Chad on July 7, 2014, @2:50 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.
Bulk Reef Supply 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.
by Kevin on October 10, 2013, @10:31 AM
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?
Bulk Reef Supply 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.
by jerry on April 1, 2014, @2:16 AM
Bulk Reef Supply Hello!
by Jeff on November 29, 2013, @9:32 AM
Will this work in a phosban 150?
Bulk Reef Supply Hey Jeff,
It sure will. Its a great combo if you need something that is hang on back!
by Scott on September 1, 2013, @8:58 AM
Can I use the high capacity in a small tank (30 gallon)?
Bulk Reef Supply 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.
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.
Deal of the Day!
Refractometer for Reading Salinity with Calibration FluidEnds in
Regular Price: $39.99
Special Price: $24.9900:00:00:00
- Specials, New & BRS Gear
- Rock & Sand
- Auto Top Off
- Cal, Alk & Trace
- Controllers & Testing
- Filter Media
- Fish & Coral Foods
- Fragging Supplies
- Heaters & Chillers
Pumps & Plumbing
- Submersible Pumps
- External Pumps
- Dosing Pumps
- Air Pumps & Accessories
- Salt & Maintenance
- Skimmers, Reactors & Filtration
- Sumps, Tanks & Refugiums
Send us your feedback
Let us know.
Phone Hours: 7am - 7pm CST M-Th
10am-4pm CST Friday
6325 Sandburg Road, Suite 400
Golden Valley, MN 55427 Map
View Larger Map 6325 Sandburg Road, Suite 400, Golden Valley, MN 55427