{"product_id":"icecap-gfo-small-1lb","title":"IceCap GFO Small 1lb","description":"\u003cdiv class=\"data item content\" id=\"description\" role=\"tabpanel\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003ch2\u003eIceCap Standard GFO Filter Media\u003c\/h2\u003e\n\u003cp\u003eIceCap Standard GFO (Granular Ferric Oxide) is a reliable and essential tool for every aquarist looking to manage nutrient levels and maintain a pristine aquatic environment. Phosphates and silicates are the primary fuel for nuisance algae and can severely stunt the growth of corals by interfering with calcification. This standard granular grade GFO provides a high surface area for chemical adsorption, permanently locking away unwanted nutrients before they can impact the health of your display.\u003c\/p\u003e\n\u003cp\u003eBecause this is a standard granular media, it is specifically designed for ease of use in fluidized reactors. The irregular shape of the grains allows them to lift and tumble with very low water pressure, ensuring that water is always in contact with fresh media surfaces. Unlike \"high capacity\" versions, which are more dense, standard GFO is more easily fluidized, making it a favorite for hobbyists using smaller pumps or standard-flow reactors. IceCap GFO is a safe, iron-based media that provides consistent phosphate removal without the risk of heavy metal leaching, making it the perfect choice for the daily maintenance of reef and planted systems.\u003c\/p\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Granular Structure:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSpecifically sized for optimal fluidization without the need for high-pressure pumps.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEfficient Adsorption:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eChemically binds phosphates and silicates to its surface through an ion-exchange process.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNon-Toxic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSafe for all aquatic life; does not affect pH and is completely free of aluminum.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eClear Results:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEffectively reduces the frequency of glass cleaning by stripping the nutrients that diatoms and algae need to thrive.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCost-Effective Maintenance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe ideal choice for systems requiring regular media changes to keep nutrients at undetectable levels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Change:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Testing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse a high-sensitivity phosphate test kit to measure the water exiting the reactor. When the output level matches the tank level, the media is saturated.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVisual Cues:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eA sudden appearance of algae on the glass or a \"dulling\" of coral color often signals that it is time for a fresh batch of GFO.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat’s Included:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIceCap Standard GFO Filter Media (Select Volume)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMedia Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eStandard Granular Ferric Oxide (GFO)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePhosphate and Silicate Adsorption\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMarine, Reef, and Freshwater Aquariums\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptimal Use:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMedia Reactors (INT\/EXT)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstructions:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRinse Thoroughly:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGFO contains fine dust from shipping. Rinse the media with RO\/DI water in a bucket or within the reactor until the water runs clear.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInitial Dosage:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse roughly 1 gram per gallon of total water volume. If your phosphates are already high, start with half this amount to avoid shocking sensitive corals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReactor Setup:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlace the media in your reactor and adjust the flow so that the top layer is gently \"boiling.\" The grains should move slightly, but not fly around the chamber.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePlacement (No Reactor):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIf a reactor is not available, place the media in a fine-mesh bag in a high-flow area of your sump, though efficiency will be reduced compared to a reactor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReplacement:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFor standard GFO, replace every 4–6 weeks or whenever phosphate levels begin to rise above 0.03 ppm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePro Tips:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAvoid \"Cementing.\"\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGFO can sometimes bind together into a solid brick if it isn't moving. Ensure your reactor has a gentle, consistent tumble. If the media stops moving, it will lose its effectiveness and become a bypass point for water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThe \"Dust\" Warning.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIf you do not rinse the media properly, a fine orange dust may enter the tank. While generally harmless to fish, this dust can irritate the gills of sensitive invertebrates. Always rinse until the water is clear before turning on the reactor's output to the display.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMonitor Alkalinity.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eStandard GFO can occasionally cause a slight drop in alkalinity as it binds nutrients. It is good practice to test your\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"mord mathnormal\"\u003ed\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eKH\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e(alkalinity) shortly after adding a fresh batch of GFO to ensure your parameters remain stable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDosage:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eGenerally, use 1 tablespoon per 10 gallons of aquarium water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePlacement: \u003c\/strong\u003eUse in a media reactor 9preferred for fluidization) or a mesh filter bag.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCaution: \u003c\/strong\u003eMonitor phosphate level carefully to avoid rapid drops, which can stress or damage corals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaintenance: \u003c\/strong\u003eReplace every 4 to 6 weeks, or when phosphate levels start to rise again.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUser Tips: \u003c\/strong\u003eStart slowly since GFO removes phosphates quickly and effectively to avoid shocking your aquarium.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eKeep out of reach of children. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"data item title\" id=\"tab-label-reviews\" role=\"tab\" tabindex=\"0\"\u003e\u003ca class=\"data switch\" href=\"https:\/\/www.coralvue.com\/icecap-gfo-filter-media#reviews\" id=\"tab-label-reviews-title\" tabindex=\"-1\"\u003eReviews\u003c\/a\u003e\u003c\/div\u003e","brand":"CoralVue","offers":[{"title":"Default Title","offer_id":56246405333297,"sku":null,"price":45.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/1047\/3265\/files\/gfo_group.webp?v=1789234207","url":"https:\/\/thelittlereefshop.com\/products\/icecap-gfo-small-1lb","provider":"The Little Reef Shop","version":"1.0","type":"link"}