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- BRS Bulk GFO Granular Ferric Oxide - High Capacity
Starting at: $53.99
Regular Price: $48.99
Special Price: $44.09
Starting at: $40.49
Starting at: $22.49
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.
Look no further! By MUSBFRANK on 4/30/2014MUSBFRANK would recommend this product to a friendLet's just say I had a serious phosphate problem and tried several other medias. I put the recommended amount of GFO in a nylon sock and pumped water through it with a powerhead. It's a 750gal reef tank and the phospates had soared up to 2.0, after putting the GFO I tested the water roughly 3 days later and they were barely detectable. Can't say enough about this stuff and I will never use anything else!
Works Great!!! By Andy on 4/4/2014Andy would recommend this product to a friend2nd time ordering & works great with fantastic results..ie perfect water parameters.
Very good at removing phosphate By KEVIN on 4/2/2014KEVIN would recommend this product to a friendWorks great. It's a little pricey but it does what I need
great stuff By Chicago on 3/25/2014Chicago would recommend this product to a friendnice and clean. I use in my reactor. With other brands took like 15 gallons until clean and clear water was following. With this high capacity only takes like 5 gallons to run clean. Love it and would recommend for all phosphate issues. Of course you cant beat the BRS service and price.
Best way to keep my phosphates low By Michael on 3/18/2014Michael would recommend this product to a friendI run this GFO in my 90 gallon mixed reef tank. Have it running in a 2 Little Fishes reactor and it works great. Replace every 4-6 months and my phosphates stay at zero. Highly recommend.
great product By angelo on 3/17/2014angelo would recommend this product to a friendbeen using this product since i started my tank. never had an issue with phosphates. lasts a long time and only have to use a little bit.
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Previously Asked Questions
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 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 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 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.
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!
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.
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