{"product_id":"seachem-reef-strontium-250ml","title":"Seachem Reef Strontium 250 mL – Reef Aquarium Strontium Supplement","description":"\u003cp\u003eSeachem Reef Strontium 250 mL is a concentrated strontium supplement formulated for marine and reef aquariums. It helps restore and maintain strontium near the levels found in natural seawater, supporting corals, coralline algae, clams, and other organisms that produce calcium-based skeletons or shells.\u003c\/p\u003e\n\u003cp\u003eReef Strontium uses gluconate-complexed strontium for aquarium supplementation. It is especially useful in established or densely stocked reef systems where strontium is gradually consumed through coral growth and calcification.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcentrated Strontium Supplement:\u003c\/strong\u003e Contains 10,000 mg\/L of strontium for marine and reef aquariums\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Calcifying Organisms:\u003c\/strong\u003e Helps maintain strontium used by stony corals, coralline algae, clams, and other calcifying livestock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains Natural Seawater Levels:\u003c\/strong\u003e Designed to restore and maintain strontium within an appropriate reef-aquarium range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGluconate-Complexed Formula:\u003c\/strong\u003e Provides strontium in a soluble supplement designed for reef aquarium use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoutine Reef Supplementation:\u003c\/strong\u003e Useful in systems where coral growth steadily consumes available strontium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConvenient 250 mL Bottle:\u003c\/strong\u003e Suitable for nano, medium, and regularly maintained home reef aquariums\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Seachem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Reef Strontium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 250 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Reef aquarium strontium supplement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcentration:\u003c\/strong\u003e 10,000 mg\/L strontium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrontium Source:\u003c\/strong\u003e Gluconate-complexed strontium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquarium Type:\u003c\/strong\u003e Marine and reef aquariums\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Strontium Range:\u003c\/strong\u003e Approximately 8–12 mg\/L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeginner Dosage:\u003c\/strong\u003e 5 mL per 20 gallons twice weekly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSPS coral aquariums\u003c\/li\u003e\n\u003cli\u003eLPS coral aquariums\u003c\/li\u003e\n\u003cli\u003eMixed reef systems\u003c\/li\u003e\n\u003cli\u003eCoralline algae growth\u003c\/li\u003e\n\u003cli\u003eTridacnid clam systems\u003c\/li\u003e\n\u003cli\u003eDensely stocked reef aquariums\u003c\/li\u003e\n\u003cli\u003eReef tanks with confirmed low strontium\u003c\/li\u003e\n\u003cli\u003eRoutine supplementation between water changes\u003c\/li\u003e\n\u003cli\u003eSystems with steady calcium-carbonate growth\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBeginner Dosing Directions\u003c\/h3\u003e\n\u003cp\u003eUse one capful, or 5 mL, of Seachem Reef Strontium for every 20 US gallons of aquarium water twice weekly.\u003c\/p\u003e\n\u003cp\u003eEach 5 mL dose per 20 gallons raises strontium by approximately 0.6 mg\/L. Adjust the quantity or dosing frequency as needed to maintain an appropriate strontium concentration.\u003c\/p\u003e\n\u003cp\u003eCalculate dosage using the aquarium’s actual water volume after accounting for displacement from rock, substrate, decorations, and equipment.\u003c\/p\u003e\n\u003ch3\u003eAdvanced Dosing Directions\u003c\/h3\u003e\n\u003cp\u003eTest the aquarium’s strontium level before making significant adjustments. Follow the standard dosing schedule until strontium reaches approximately 8–12 mg\/L.\u003c\/p\u003e\n\u003cp\u003eOnce the desired concentration has been reached, adjust the dose or frequency according to the aquarium’s measured consumption rate. Densely stocked reef aquariums and systems with rapid coral growth may consume strontium more quickly.\u003c\/p\u003e\n\u003cp\u003eMake large corrections gradually to reduce the risk of exceeding the intended level.\u003c\/p\u003e\n\u003ch3\u003eApproximate Dosing Guide\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Gallon Aquarium:\u003c\/strong\u003e Approximately 2.5 mL twice weekly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20-Gallon Aquarium:\u003c\/strong\u003e 5 mL twice weekly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40-Gallon Aquarium:\u003c\/strong\u003e 10 mL twice weekly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e55-Gallon Aquarium:\u003c\/strong\u003e Approximately 13.75 mL twice weekly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75-Gallon Aquarium:\u003c\/strong\u003e Approximately 18.75 mL twice weekly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100-Gallon Aquarium:\u003c\/strong\u003e 25 mL twice weekly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese amounts are proportional calculations based on Seachem’s beginner dosage. Test regularly and follow the current instructions printed on the bottle.\u003c\/p\u003e\n\u003ch3\u003eWhy Strontium Matters\u003c\/h3\u003e\n\u003cp\u003eStrontium is chemically similar to calcium and is incorporated into the skeletons and shells of many marine organisms. Natural seawater generally contains approximately 8–10 mg\/L of strontium.\u003c\/p\u003e\n\u003cp\u003eCorals, coralline algae, clams, and other calcifying organisms may gradually remove strontium from aquarium water as they grow. Maintaining an appropriate concentration helps provide these organisms with a continued supply.\u003c\/p\u003e\n\u003ch3\u003eUsing Strontium with Calcium \u0026amp; Alkalinity Supplements\u003c\/h3\u003e\n\u003cp\u003eStrontium supplementation complements, but does not replace, calcium and alkalinity management. Reef-building corals require stable calcium, alkalinity, magnesium, salinity, temperature, and nutrient levels in addition to trace and minor elements.\u003c\/p\u003e\n\u003cp\u003eTest calcium and alkalinity regularly and maintain them within an appropriate range for the livestock being kept. Do not rely on Reef Strontium to correct low calcium, low alkalinity, or unstable pH.\u003c\/p\u003e\n\u003cp\u003eWhen using multiple supplements, add them separately according to their labels. Avoid directly mixing concentrated aquarium supplements together unless the manufacturer specifically permits it.\u003c\/p\u003e\n\u003ch3\u003eDosing Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShake the bottle before use if instructed on the label\u003c\/li\u003e\n\u003cli\u003eMeasure dosage according to actual aquarium water volume\u003c\/li\u003e\n\u003cli\u003eUse a dosing syringe for amounts smaller than one capful\u003c\/li\u003e\n\u003cli\u003eAdd the supplement to an area with good water movement\u003c\/li\u003e\n\u003cli\u003eTest strontium before making large adjustments\u003c\/li\u003e\n\u003cli\u003eIncrease low strontium gradually rather than with one large dose\u003c\/li\u003e\n\u003cli\u003eKeep a log of test results and dosing amounts\u003c\/li\u003e\n\u003cli\u003eAdjust dosage according to measured aquarium consumption\u003c\/li\u003e\n\u003cli\u003eContinue regular water changes and routine reef maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Reef Aquarium Note\u003c\/h3\u003e\n\u003cp\u003eStrontium should not be dosed excessively or based only on coral appearance. Pale coloration, reduced growth, tissue loss, or poor polyp extension can be caused by many factors and do not independently confirm a strontium deficiency.\u003c\/p\u003e\n\u003cp\u003eBefore increasing supplementation, review salinity, temperature, calcium, alkalinity, magnesium, nitrate, phosphate, lighting, water flow, pests, and overall aquarium stability.\u003c\/p\u003e\n\u003cp\u003eMore strontium does not necessarily produce faster coral growth. Test when possible and dose conservatively to avoid exceeding the desired range.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is Seachem Reef Strontium used for?\u003c\/strong\u003e\u003cbr\u003eReef Strontium is used to restore and maintain strontium in marine and reef aquariums containing corals, coralline algae, clams, and other calcifying organisms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much Reef Strontium should I use?\u003c\/strong\u003e\u003cbr\u003eUse 5 mL for every 20 US gallons twice weekly as the beginner dosage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much does one dose raise strontium?\u003c\/strong\u003e\u003cbr\u003eA dose of 5 mL per 20 gallons raises strontium by approximately 0.6 mg\/L.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat strontium level should I maintain?\u003c\/strong\u003e\u003cbr\u003eSeachem recommends adjusting and maintaining strontium at approximately 8–12 mg\/L.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the natural seawater strontium level?\u003c\/strong\u003e\u003cbr\u003eNatural seawater generally contains approximately 8–10 mg\/L of strontium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes 5 mL per 20 gallons raise strontium by 1 ppm?\u003c\/strong\u003e\u003cbr\u003eNo. Seachem states that 5 mL per 20 gallons raises strontium by approximately 0.6 mg\/L.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is strontium important in reef aquariums?\u003c\/strong\u003e\u003cbr\u003eStrontium is incorporated into the calcium-based skeletons and shells of many corals, coralline algae, clams, and other marine organisms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo water changes replace strontium?\u003c\/strong\u003e\u003cbr\u003eWater changes may replace some strontium, depending on the salt mix and water-change schedule. Densely stocked or rapidly growing reef systems may still consume strontium faster than it is replaced.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan Reef Strontium be used in mixed reef aquariums?\u003c\/strong\u003e\u003cbr\u003eYes. It may be used in mixed reef systems when dosed according to the label and maintained within an appropriate concentration range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan too much strontium be harmful?\u003c\/strong\u003e\u003cbr\u003eExcessive supplementation may push strontium above the intended level. Test when possible, make large adjustments slowly, and avoid unnecessary overdosing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Reef Strontium replace calcium and alkalinity supplements?\u003c\/strong\u003e\u003cbr\u003eNo. Strontium is a separate element and does not replace calcium, alkalinity, magnesium, or complete reef aquarium maintenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould I test before dosing?\u003c\/strong\u003e\u003cbr\u003eRoutine beginner dosing may be used according to the label, but testing is strongly recommended when adjusting the dose, correcting a suspected deficiency, or maintaining a heavily stocked reef system.\u003c\/p\u003e\n\u003ch3\u003eAvailable at Tropical Treasures Wyo\u003c\/h3\u003e\n\u003cp\u003eSeachem Reef Strontium 250 mL helps restore and maintain strontium for corals, coralline algae, clams, and other calcifying reef organisms. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop Seachem reef supplements, calcium and alkalinity products, marine test kits, dosing supplies, reef foods, and aquarium care essentials.\u003c\/p\u003e","brand":"Tropical Treasures Wyo LLC","offers":[{"title":"Default Title","offer_id":53005015318741,"sku":null,"price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/4545\/8133\/files\/SC03760-2T.png?v=1784898197","url":"https:\/\/tropicaltreasureswyo.com\/products\/seachem-reef-strontium-250ml","provider":"Tropical Treasures Wyo LLC","version":"1.0","type":"link"}