--- product_id: 214009813 title: "GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lbs)" brand: "tl reefs" price: "VT36461" currency: VUV in_stock: true reviews_count: 5 category: "Tl Reefs" url: https://www.desertcart.vu/products/214009813-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater-aquariums-1lbs store_origin: VU region: Vanuatu --- # Effective for 50 gallons per 1/2 cup Molecular phosphate bonding Optimized for fluidized reactors GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lbs) **Brand:** tl reefs **Price:** VT36461 **Availability:** ✅ In Stock ## Summary > 🌟 Keep your reef thriving—ditch phosphates, not style! ## Quick Answers - **What is this?** GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lbs) by tl reefs - **How much does it cost?** VT36461 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/214009813-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater-aquariums-1lbs) ## 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 - • **Precision Dosing:** Use just 1/2 cup per 50 gallons for fast, measurable phosphate reduction. - • **Trusted by Aquarists:** Backed by 195 reviews and a solid 4.0-star rating—join the reef care pros. - • **Algae’s Worst Enemy:** Targets phosphate sources fueling algae, keeping your reef crystal clear. - • **Phosphate? Gone for Good!:** Permanently bonds phosphates—no leaching back into your tank water. - • **Flow-Optimized Performance:** Designed for fluidized reactors or high-flow sump placement to prevent clumping. ## Overview TL Reefs GFO Phosphate Remover uses granular ferric oxide to permanently bind phosphates in saltwater aquariums, preventing algae growth and maintaining crystal-clear water. Ideal for use in fluidized reactors or high-flow sump areas, it treats 50 gallons per 1/2 cup dose and is trusted by hundreds of aquarists for fast, reliable phosphate control. ## Description Product description Granular Ferric Oxide is a popular means of reducing and maintaining low phosphate levels in your aquarium. There are many sources of phosphates in your aquarium. They can come from your base rock, fish food, or any other organic matter that enters the tank. They are a leading cause of algae problems, including diatoms, hair algae, and cyanobacteria. GFO removes phosphate by molecular bond and will not leach them back into your water when exhausted. The most popular and effective implementation method is with the use of a fluidized reactor. Use a flowrate through the reactor just strong enough to keep it gently tumbling. This will help prevent clumping and channeling of your GFO media. The other method of use is by filling a media bag, and placing in a high flow area of your sump, or filter compartment. Directions Rinse before use. Use 1/2 cup per 50 gallons of aquarium water. For best results, use in a fluidized reactor with a flowrate strong enough to keep the GFO gently tumbling, or place in a media bag in a high flow area of your sump or filter compartment. Review: 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: 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 - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0773RFPJ6 | | Best Sellers Rank | 287,449 in Pet Supplies ( See Top 100 in Pet Supplies ) 2,207 in Aquarium Water Treatments | | Brand Name | TL Reefs | | Customer Reviews | 4.2 4.2 out of 5 stars (195) | | Item Form | Granules | | Item Weight | 454 g | | Liquid Volume | 50 Gallons | | Manufacturer | Lanxess Corporation | | Manufacturer Part Number | 11273227 | | Model Number | 11273227 | | Pet Type | Fish | | Target Species | Fish | | UPC | 600150909958 | | Unit Count | 453.5924 gram | ## Product Details - **Brand:** TL Reefs - **Item form:** Granules - **Item weight:** 454 g - **Liquid volume:** 50 Gallons - **Manufacturer:** Lanxess Corporation ## Images ![GFO Phosphate Remover, Granular Ferric Oxide, for Saltwater Aquariums (1lbs) - Image 1](https://m.media-amazon.com/images/I/81ko2Iyt5SL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by L***. on 16 December 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. ### ⭐⭐⭐⭐⭐ Review *by J***Y on 10 October 2022* Really dusty and extra small grain sizes. Make sure you have a really fine mesh bag or reactor. Works quickly. ### ⭐⭐⭐ Review *by J***N on 14 December 2024* This GFO has very small granules. i needed to sift it to get all the fine particles and dust out. I have a DIY reactor with a fine mesh screen and this GFO clogs the screen very quickly, even after sifting and rinsing. Maybe i will need to get a different reactor, but It seems like this is a common issue with this GFO. ## 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.vu/products/214009813-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater-aquariums-1lbs](https://www.desertcart.vu/products/214009813-gfo-phosphate-remover-granular-ferric-oxide-for-saltwater-aquariums-1lbs) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-04*