{"product_id":"seachem-phosguard-phosphate-silicate-remover","title":"Seachem PhosGuard","description":"\u003cstyle\u003e\n  .aq-pd { font-family: Georgia, serif; color: #1a1a1a; max-width: 860px; margin: 0 auto; line-height: 1.7; }\n  .aq-pd h2 { font-size: 1.45em; font-weight: 700; letter-spacing: -0.01em; border-left: 4px solid #1E88E5; padding-left: 12px; margin: 2em 0 0.6em; }\n  .aq-pd p { margin: 0.5em 0 1em; }\n  .aq-callout { background: #1a1a1a; color: #fff; border-radius: 4px; padding: 16px 20px; margin: 1.6em 0; font-family: Arial, sans-serif; font-size: 0.93em; line-height: 1.6; }\n  .aq-callout strong { color: #f5c518; }\n  .aq-features { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 1em 0 1.6em; }\n  .aq-feature-card { background: #f4f4f4; border-radius: 4px; padding: 14px 16px; border-left: 3px solid #1E88E5; font-family: Arial, sans-serif; font-size: 0.9em; }\n  .aq-feature-card strong { display: block; margin-bottom: 3px; color: #1a1a1a; }\n  .aq-feature-card span { color: #555; }\n  .aq-compare { overflow-x: auto; margin: 1em 0 1.6em; }\n  .aq-compare table { width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 0.88em; min-width: 560px; }\n  .aq-compare th { background: #1E88E5; color: #fff; padding: 9px 14px; text-align: center; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; }\n  .aq-compare th:first-child { background: #1a1a1a; text-align: left; }\n  .aq-compare td { padding: 8px 14px; border-bottom: 1px solid #ddd; text-align: center; }\n  .aq-compare td:first-child { text-align: left; font-weight: 600; color: #444; background: #fafafa; }\n  .aq-compare tr:nth-child(even) td:not(:first-child) { background: #F1F8FE; }\n  .aq-specs-table { width: 100%; border-collapse: collapse; margin-top: 1em; font-family: Arial, sans-serif; font-size: 0.93em; }\n  .aq-specs-table th { background: #1a1a1a; color: #fff; text-align: left; padding: 9px 14px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.82em; }\n  .aq-specs-table td { padding: 8px 14px; border-bottom: 1px solid #e5e5e5; vertical-align: top; }\n  .aq-specs-table tr:nth-child(even) td { background: #f9f9f9; }\n  .aq-specs-table td:first-child { font-weight: 600; width: 45%; color: #444; }\n\u003c\/style\u003e\n\u003cdiv class=\"aq-pd\"\u003e\n\u003cp\u003e\u003cstrong\u003eSeachem PhosGuard\u003c\/strong\u003e rapidly removes phosphate and silicate from marine and freshwater aquariums, starving the nuisance algae that feed on them. Its spherical, highly porous beads pack a huge amount of surface area into a small volume and let water flow freely through and around the media, so it works fast and lasts. Browse the rest of our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/filter-media-cartridges\"\u003efilter media and cartridges\u003c\/a\u003e and the full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/seachem\"\u003eSeachem lineup\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"aq-callout\"\u003e\n\u003cstrong\u003ePhosphate and silicate, gone.\u003c\/strong\u003e PhosGuard targets the two nutrients behind most algae outbreaks and cloudy glass. The bead shape promotes easy flow for higher efficiency and capacity than flat or powdery media.\u003c\/div\u003e\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003ePhosphate and silicate are the fuel for hair algae, diatoms, and green water. PhosGuard adsorbs both as water passes through it, pulling them out of the system so algae cannot use them. It works in fresh and salt water, though it is most efficient in marine tanks. Run it in a media bag or fluidized reactor with good flow, and replace it when phosphate or silicate levels start to climb again. Note: PhosGuard is not recommended for phosphate-buffered freshwater, because it would strip that buffer until it is saturated.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cdiv class=\"aq-features\"\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eRemoves phosphate\u003c\/strong\u003e\u003cspan\u003eCuts the nutrient that drives hair algae and cyano.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eRemoves silicate\u003c\/strong\u003e\u003cspan\u003eControls diatoms and the brown film on new tanks.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eSpherical beads\u003c\/strong\u003e\u003cspan\u003eHigh surface area with free water flow for speed and capacity.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eFresh \u0026amp; marine\u003c\/strong\u003e\u003cspan\u003eWorks in both, and is most effective in saltwater.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eReactor or bag\u003c\/strong\u003e\u003cspan\u003eUse in a fluidized reactor or a media bag in your filter.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eCrystal-clear water\u003c\/strong\u003e\u003cspan\u003eLess algae fuel means cleaner glass and brighter tanks.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eChoose Your Size\u003c\/h2\u003e\n\u003cdiv class=\"aq-compare\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003e100 mL\u003c\/th\u003e\n\u003cth\u003e250 mL\u003c\/th\u003e\n\u003cth\u003e500 mL\u003c\/th\u003e\n\u003cth\u003e1 L\u003c\/th\u003e\n\u003cth\u003e2 L\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreats Up To\u003c\/td\u003e\n\u003ctd\u003e~60 gal\u003c\/td\u003e\n\u003ctd\u003e~150 gal\u003c\/td\u003e\n\u003ctd\u003e~300 gal\u003c\/td\u003e\n\u003ctd\u003e~600 gal\u003c\/td\u003e\n\u003ctd\u003e~1,200 gal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eNano tanks\u003c\/td\u003e\n\u003ctd\u003eStandard tanks\u003c\/td\u003e\n\u003ctd\u003eReef \u0026amp; large FW\u003c\/td\u003e\n\u003ctd\u003eBig systems\u003c\/td\u003e\n\u003ctd\u003eReactors \u0026amp; stores\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eBeads\u003c\/td\u003e\n\u003ctd\u003eBeads\u003c\/td\u003e\n\u003ctd\u003eBeads\u003c\/td\u003e\n\u003ctd\u003eBeads\u003c\/td\u003e\n\u003ctd\u003eBeads (bulk)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-family: Arial,sans-serif; font-size: 0.82em; color: #777; font-style: italic;\" class=\"aq-note\"\u003eCoverage is approximate and depends on nutrient load. Media is consumed over time and should be replaced when phosphate or silicate creeps back up.\u003c\/p\u003e\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003cp\u003eRinse PhosGuard before use, then place it in a fine media bag or a fluidized bed reactor where water flows through it. Begin with about 85 mL (one third cup) for every 200 L (50 US gallons). Test phosphate and silicate regularly and replace the media once levels start rising again. For best results, pair phosphate control with good carbon filtration and mechanical polishing.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"aq-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePhosphate \u0026amp; silicate adsorption media\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemoves\u003c\/td\u003e\n\u003ctd\u003ePhosphate (PO4) and silicate (SiO2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eSpherical porous beads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarting dose\u003c\/td\u003e\n\u003ctd\u003e85 mL per 50 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eFreshwater \u0026amp; saltwater (best in marine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse in\u003c\/td\u003e\n\u003ctd\u003eMedia bag or fluidized reactor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSizes\u003c\/td\u003e\n\u003ctd\u003e100 mL, 250 mL, 500 mL, 1 L, 2 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePairs Well With\u003c\/h2\u003e\n\u003cp\u003eBuild a complete clarity setup: run \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-matrix-carbon\"\u003eSeachem Matrix Carbon\u003c\/a\u003e for dissolved organics, polish the water with a \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-tidal-polishing-pad-50-micron-fine-filter\"\u003eSeachem Tidal Polishing Pad\u003c\/a\u003e, and keep tabs on nutrients with a \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/fritz-phosphate-test-kit-po4-freshwater-saltwater\"\u003eFritz Phosphate Test Kit\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill PhosGuard work in my freshwater tank?\u003c\/strong\u003e\u003cbr\u003eYes, but it is most effective in saltwater. Avoid using it in phosphate-buffered freshwater, since it will strip the buffer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know when to replace it?\u003c\/strong\u003e\u003cbr\u003eTest phosphate and silicate. When the numbers start climbing again, the media is saturated and should be swapped out.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a reactor?\u003c\/strong\u003e\u003cbr\u003eNo. A media bag with good flow works well, though a fluidized reactor gives the most efficient contact.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it with carbon?\u003c\/strong\u003e\u003cbr\u003eAbsolutely. Many keepers run PhosGuard and activated carbon together for the clearest water.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Seachem","offers":[{"title":"100 mL","offer_id":48805379539163,"sku":"185","price":5.89,"currency_code":"USD","in_stock":true},{"title":"250 mL","offer_id":48805379571931,"sku":"186","price":7.29,"currency_code":"USD","in_stock":true},{"title":"500 mL","offer_id":48805379604699,"sku":"183","price":12.5,"currency_code":"USD","in_stock":true},{"title":"1 L","offer_id":48805382160603,"sku":"187","price":20.5,"currency_code":"USD","in_stock":true},{"title":"2 L","offer_id":48805379637467,"sku":"188","price":36.33,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/0185-PhosGuard-100-mL.png?v=1779699666","url":"https:\/\/squeakysaquatics.com\/products\/seachem-phosguard-phosphate-silicate-remover","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}