--- product_id: 53035078 title: "TL Reefs GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lb, 454g)" brand: "tl reefs" price: "$91.18" currency: USD in_stock: true reviews_count: 8 category: "Tl Reefs" url: https://www.desertcart.us/products/53035078-tl-reefs-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater store_origin: US region: United States of America --- # 1lb powder lasts up to 3 years Fast-acting phosphate reduction Permanently bonds phosphate TL Reefs GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lb, 454g) **Brand:** tl reefs **Price:** $91.18 **Availability:** ✅ In Stock ## Summary > 🌟 Lock in crystal-clear waters and reef health with TL Reefs GFO! ## Quick Answers - **What is this?** TL Reefs GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lb, 454g) by tl reefs - **How much does it cost?** $91.18 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/53035078-tl-reefs-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater) ## Best For - tl reefs enthusiasts ## Why This Product - Trusted tl reefs brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Long-Lasting Value 🧴:** One pound of TL Reefs GFO can last nearly three years, making it a cost-effective solution for busy reef keepers. - • **Phosphate Lockdown ⚛️:** Permanently binds phosphates to protect your reef’s delicate balance without leaching back. - • **Rapid Clarity Boost ⏱️:** Experience fast, visible reduction in phosphate levels to keep your aquarium pristine and thriving. - • **Effortless Integration 🔄:** Easily fits into fine mesh bags or media reactors for seamless installation in your sump or filter system. - • **Optimized for Reef Health 🌊:** Maintains low phosphate levels to prevent algae blooms and coral stress, ensuring a vibrant marine ecosystem. ## Overview TL Reefs GFO is a premium granular ferric oxide phosphate remover designed for saltwater aquariums. It permanently bonds phosphate, preventing leaching, and works rapidly to reduce phosphate levels. Ideal for use in fine mesh bags or media reactors, this 1lb powder offers long-lasting performance—often up to three years—making it an affordable, efficient choice for maintaining optimal reef conditions and preventing algae overgrowth. ## Description desertcart.com : TL Reefs GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lb, 454g) : Pet Supplies Review: works FAST to reduce phosphates - I prefer to not use socks because of the amphipods and copepods in my large mixed reef saltwater system, which is probably why a pound of this powdered GFO lasts me almost 3 years. I'm back for more, but like everything else in the aquarium hobby the price has gone up since I first got this. However, this powdered GFO is still among the most affordable options for reducing phosphates. They say 'rinse, rinse, rinse' but I'm lazy. Because I'm using a bag to hold my GFO plus filter sock to hold the GFO bag, I let the filter sock 'rinse' but I enclose a photo as some of you may not like that super fine powder that escapes the bag to be running around in the sock... but I figure even that fine powder is reducing phosphates so I'm not wasting the extra fine powder most probably rinse away and I find it is kept contained by the sock. Also, to the guy who complained about his fine bag - compare his photo of bag to my photo of bag. A fine mesh bag designed to hold powdered filter media is going to appear like solid thin fabric so that other guy was doomed just by his choice of bag. Don't just go with any bag that says it is fine - actually LOOK at the bag to ensure it looks like what you need for fine granules. You'll find many more uses for this grade of mesh, so that is what I keep around for my various aquariums needs. I have media reactor that I use cubes coated with GFO but that is a more expensive option than this powdered GFO. When the cubes exhaust their phosphate absorption and/or my reactor gets gunky, I usually am living life too busy and I have a mess on my hands I have to get under control asap so death doesn't keep rolling through my corals from too high phosphates. I like this option because it is easy and results are immediate. I use a very fine mesh bag and I just pour in this GFO. Then I put the mesh bag filled with GFO into one of my two filter socks (dual overflow system) that are in the first chamber of my sump. This forces more water thru the GFO in the fine mesh bag than if the fine mesh bag were just laying on the bottom of my sump or even if I tried stuffing the bag between sump section baffles, as water wants to take the path of least resistance which is going around my fine mesh bag stuffed with GFO. When my socks get dirty, I throw those in a bucket and collect a bunch before I deal with the sump dirty socks. I put new socks in place and just move the GFO from the dirty to clean sock, as the GFO is still in its fine mesh bag I tied shut. If you use socks or if you have a media reactor designed for powders, this powdered GFO is absolutely the easiest and most affordable way to reduce phosphates. Review: Works - Really dusty and extra small grain sizes. Make sure you have a really fine mesh bag or reactor. Works quickly. ## Features - Permanently bonds phosphate and will not leach back into aquarium water - Rinse before use. Use 1/2 cup per 50 gallons of aquarium water - Monitor phosphate levels and replace when levels begin to rise ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0773RFPJ6 | | ASIN | B0773RFPJ6 | | Best Sellers Rank | #79,217 in Pet Supplies ( See Top 100 in Pet Supplies ) #750 in Aquarium Water Treatments | | Brand Name | TL Reefs | | Customer Reviews | 4.2 4.2 out of 5 stars (275) | | Date First Available | November 2, 2017 | | Date First Available | November 2, 2017 | | Directions | 1. Rinse the GFO before use. 2. Use 1/2 cup per 50 gallons of aquarium water. 3. Monitor phosphate levels and replace the GFO when levels begin to rise. 4. Implement the GFO in a fluidized reactor with a flowrate just strong enough to keep it gently tumbling or fill a media bag and place it in a high flow area of your sump or filter compartment. | | Is Discontinued By Manufacturer | No | | Item Package Dimensions L x W x H | 11 x 6 x 2 inches | | Item Weight | 16 ounces | | Item model number | 11273227 | | Item model number | 11273227 | | Manufacturer | Lanxess Corporation | | Manufacturer | Lanxess Corporation | | Number of Items | 1 | | Package Dimensions | 11 x 6 x 2 inches; 1 Pounds | | Size | 1lbs | | Target Audience Keyword | fish | ## Product Details - **Brand:** TL Reefs - **Item Form:** Granules - **Item Weight:** 16 ounces - **Liquid Volume:** 50 Gallons - **Manufacturer:** Lanxess Corporation ## Images ![TL Reefs GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lb, 454g) - Image 1](https://m.media-amazon.com/images/I/81ko2Iyt5SL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ works FAST to reduce phosphates *by L***. on December 16, 2024* I prefer to not use socks because of the amphipods and copepods in my large mixed reef saltwater system, which is probably why a pound of this powdered GFO lasts me almost 3 years. I'm back for more, but like everything else in the aquarium hobby the price has gone up since I first got this. However, this powdered GFO is still among the most affordable options for reducing phosphates. They say 'rinse, rinse, rinse' but I'm lazy. Because I'm using a bag to hold my GFO plus filter sock to hold the GFO bag, I let the filter sock 'rinse' but I enclose a photo as some of you may not like that super fine powder that escapes the bag to be running around in the sock... but I figure even that fine powder is reducing phosphates so I'm not wasting the extra fine powder most probably rinse away and I find it is kept contained by the sock. Also, to the guy who complained about his fine bag - compare his photo of bag to my photo of bag. A fine mesh bag designed to hold powdered filter media is going to appear like solid thin fabric so that other guy was doomed just by his choice of bag. Don't just go with any bag that says it is fine - actually LOOK at the bag to ensure it looks like what you need for fine granules. You'll find many more uses for this grade of mesh, so that is what I keep around for my various aquariums needs. I have media reactor that I use cubes coated with GFO but that is a more expensive option than this powdered GFO. When the cubes exhaust their phosphate absorption and/or my reactor gets gunky, I usually am living life too busy and I have a mess on my hands I have to get under control asap so death doesn't keep rolling through my corals from too high phosphates. I like this option because it is easy and results are immediate. I use a very fine mesh bag and I just pour in this GFO. Then I put the mesh bag filled with GFO into one of my two filter socks (dual overflow system) that are in the first chamber of my sump. This forces more water thru the GFO in the fine mesh bag than if the fine mesh bag were just laying on the bottom of my sump or even if I tried stuffing the bag between sump section baffles, as water wants to take the path of least resistance which is going around my fine mesh bag stuffed with GFO. When my socks get dirty, I throw those in a bucket and collect a bunch before I deal with the sump dirty socks. I put new socks in place and just move the GFO from the dirty to clean sock, as the GFO is still in its fine mesh bag I tied shut. If you use socks or if you have a media reactor designed for powders, this powdered GFO is absolutely the easiest and most affordable way to reduce phosphates. ### ⭐⭐⭐⭐⭐ Works *by J***Y on October 10, 2022* Really dusty and extra small grain sizes. Make sure you have a really fine mesh bag or reactor. Works quickly. ### ⭐⭐⭐⭐ Great deal, read further *by A***O on January 12, 2019* As several others have noted, the granularity is very fine, and there is a fair amount of product dust. This really needs to be used with a media reactor, not just a filter bag. The larger the reactor, the better, so as to let smaller particles fall back down. That being said, this product is at an excellent price, and controls my phosphates well in my 300g mixed reef. When phosphates start to climb, for the first time, I just top off what is already there with another 1/2 - 1 cup. This gives me a little more time out of the product as a whole, rather than just throwing the entire contents out. This is my second purchase of this product, and everything has been consistent. Hope this review helps others. ## Frequently Bought Together - TL Reefs GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lbs) - Marineland Black Diamond Premium Activated Carbon, Filter Media For Aquariums, 40 Ounces - DEPEPE 10pcs 7.8 x 5.9 Inch Aquarium Filter Media Bags with Zipper for Activated Carbon, Biospheres, Ceramic Rings --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/53035078-tl-reefs-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater](https://www.desertcart.us/products/53035078-tl-reefs-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-04*