{"product_id":"seachem-reef-pack-npk-nitrogen-phosphorus-potassium-reef-supplements","title":"Seachem Reef Pack NPK | 3 x 100mL Nitrogen + Phosphorus + Potassium Set","description":"\u003cp\u003eThe \u003cstrong\u003eSeachem Reef Pack NPK\u003c\/strong\u003e is a 3-bottle reef-supplementation kit that takes coral color and macroalgae growth to the next level. Each pack includes \u003cstrong\u003eReef Nitrogen™, Reef Phosphorus™, and Reef Potassium™\u003c\/strong\u003e — three 100 mL bottles of targeted, marine-formulated supplements that let you dial in N, P, and K independently without dosing dissolved organics. Browse more reef care in our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003eSaltwater Collection\u003c\/a\u003e and pair with \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003eWater Test Kits\u003c\/a\u003e so you can tune your dosing to actual tank readings.\u003c\/p\u003e\n\n\u003ch3\u003eWhy This Pack\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThree reef essentials in one box\u003c\/strong\u003e — Reef Nitrogen, Reef Phosphorus, and Reef Potassium, each in a 100 mL bottle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndependent N, P, and K dosing\u003c\/strong\u003e — correct one limiting nutrient at a time instead of a one-size-fits-all blend.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTargeted reef formula\u003c\/strong\u003e — Seachem’s reef-specific NPK line, not the freshwater Flourish version.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBetter color \u0026amp; growth\u003c\/strong\u003e — balanced N and P in particular drive deeper coral pigmentation and faster macroalgae growth.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo dissolved organics\u003c\/strong\u003e — inorganic formulations avoid feeding nuisance algae or destabilizing skimmer performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrusted brand\u003c\/strong\u003e — backed by Seachem’s decades of marine-supplement chemistry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s in the Pack\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReef Nitrogen™ (100 mL)\u003c\/strong\u003e — raises nitrogen so it stays balanced with phosphorus, supporting optimal coral color and macroalgae growth. Use when nitrate (NO\u003csub\u003e3\u003c\/sub\u003e) is low or undetectable.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReef Phosphorus™ (100 mL)\u003c\/strong\u003e — boosts phosphorus for protein synthesis and metabolism in corals. Use when phosphate (PO\u003csub\u003e4\u003c\/sub\u003e) is low and growth\/color has stalled.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReef Potassium™ (100 mL)\u003c\/strong\u003e — replenishes the third major macronutrient required for coral metabolism and pigmentation. Often depleted by GFO and heavy water changes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003eAlways test before dosing. Reef Pack NPK is most effective when used with a reef test kit so you can target specific deficiencies rather than dose blindly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTest:\u003c\/strong\u003e Measure nitrate, phosphate, and potassium in your tank.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDose to target:\u003c\/strong\u003e Follow each bottle’s label dosing chart to raise the deficient parameter toward the recommended reef range.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRe-test:\u003c\/strong\u003e Wait 24 hours, re-test, and adjust the next dose accordingly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaintenance:\u003c\/strong\u003e Once parameters are stable, dose to replace daily uptake by corals and macroalgae.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eAlways read each individual bottle’s label for full dosing instructions and safety information.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eReef Pack NPK\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003ePack Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eReef Nitrogen 100 mL + Reef Phosphorus 100 mL + Reef Potassium 100 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eBottle Sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e3 × 100 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eTank Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eSaltwater \u0026amp; reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eTargets\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eNitrogen, phosphorus, and potassium\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eUse With\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eReef test kits for targeted dosing\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eReef Safe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eYes — safe for fish, corals, and invertebrates when used as directed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003eReef Test Kits\u003c\/a\u003e — nitrate, phosphate, and potassium test kits to dose accurately.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/saltwater-refractometer-hard-case-atc-salinity-tester\"\u003eSaltwater Refractometer\u003c\/a\u003e — lock down salinity before tuning trace nutrients.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eMore Reef Additives \u0026amp; Supplements\u003c\/a\u003e — calcium, alkalinity, magnesium, and trace blends.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-mixes\"\u003ePremium Salt Mixes\u003c\/a\u003e — start with a quality salt mix for a stable baseline.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/maintenance-water-care\"\u003eMaintenance \u0026amp; Water Care\u003c\/a\u003e — everything else your reef needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to dose all three bottles every day?\u003c\/strong\u003e\u003cbr\u003e\nNot necessarily. Test first — only dose the parameter that’s actually low. Many tanks need only one or two of the three.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this the same as the Plant Pack NPK?\u003c\/strong\u003e\u003cbr\u003e\nNo. The Plant Pack NPK uses Flourish Nitrogen, Phosphorus, and Potassium for freshwater planted tanks. \u003cstrong\u003eReef Pack NPK\u003c\/strong\u003e uses the marine-specific Reef Nitrogen, Reef Phosphorus, and Reef Potassium formulas for saltwater reef systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this raise nutrients too high in a low-nutrient reef?\u003c\/strong\u003e\u003cbr\u003e\nOnly if you over-dose. Reef Pack NPK is designed to \u003cem\u003ecorrect\u003c\/em\u003e low or undetectable nitrate, phosphate, and potassium levels — ULNS (ultra-low-nutrient systems) often need exactly this kind of targeted addition. Dose conservatively and test 24 hours later.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this in a fish-only saltwater tank?\u003c\/strong\u003e\u003cbr\u003e\nReef Pack NPK is designed for reef tanks with corals and macroalgae. Fish-only systems generally don’t need supplemental N, P, or K.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow long will the bottles last?\u003c\/strong\u003e\u003cbr\u003e\nDepends entirely on tank size and dose, but at typical maintenance dosing on a 50–100 gallon reef, three 100 mL bottles will last several months.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":48749769851099,"sku":"1340","price":15.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_8e597832-a107-43d1-8726-8d70c6e50ee6.png?v=1778077259","url":"https:\/\/squeakysaquatics.com\/products\/seachem-reef-pack-npk-nitrogen-phosphorus-potassium-reef-supplements","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}