{"product_id":"seachem-reef-fusion-1-500ml","title":"Seachem Reef Fusion 1 500 mL – Concentrated Reef Calcium Supplement","description":"\u003cp\u003eSeachem Reef Fusion 1 500 mL is the concentrated calcium component of Seachem’s two-part Reef Fusion dosing system. It supplies 100,000 mg\/L of ionic calcium along with biologically appropriate amounts of magnesium, strontium, boron, iron, manganese, molybdenum, and rubidium.\u003c\/p\u003e\n\u003cp\u003eWhen paired with Seachem Reef Fusion 2, Reef Fusion 1 helps maintain the calcium and alkalinity levels required by stony corals, coralline algae, clams, and other calcifying reef organisms. The two-part system uses a simple 1:1 dosing ratio, making it convenient for routine reef aquarium maintenance.\u003c\/p\u003e\n\u003cp\u003eThe 500 mL bottle is an excellent choice for nano to medium reef aquariums, mixed reef systems, and hobbyists beginning a two-part calcium and alkalinity dosing routine.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly Concentrated Calcium:\u003c\/strong\u003e Provides 100,000 mg\/L of ionic calcium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart One of a Two-Part System:\u003c\/strong\u003e Designed for use with Seachem Reef Fusion 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple 1:1 Dosing Ratio:\u003c\/strong\u003e Dose equal amounts of Reef Fusion 1 and Reef Fusion 2 for balanced supplementation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes Supporting Elements:\u003c\/strong\u003e Contains magnesium, strontium, boron, iron, manganese, molybdenum, and rubidium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Calcification:\u003c\/strong\u003e Helps provide calcium used by stony corals, coralline algae, clams, and other reef-building organisms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Dosing:\u003c\/strong\u003e May be used with Reef Fusion 2 or separately when correcting an imbalanced calcium level\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConvenient Liquid Formula:\u003c\/strong\u003e Easy to measure manually or dispense with a dosing pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500 mL Bottle:\u003c\/strong\u003e Suitable for nano, small, and medium reef aquarium systems\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 Fusion 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 500 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent Size:\u003c\/strong\u003e Approximately 17 fl oz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Concentrated reef aquarium calcium supplement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Part one of the Seachem Reef Fusion two-part system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium Concentration:\u003c\/strong\u003e 100,000 mg\/L ionic calcium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquarium Type:\u003c\/strong\u003e Saltwater and reef aquariums\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Dosage:\u003c\/strong\u003e 1 mL per 6.5 US gallons every one to two days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Calcium Range:\u003c\/strong\u003e 380–420 mg\/L\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncluded Elements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCalcium\u003c\/li\u003e\n\u003cli\u003eMagnesium\u003c\/li\u003e\n\u003cli\u003eStrontium\u003c\/li\u003e\n\u003cli\u003eBoron\u003c\/li\u003e\n\u003cli\u003eIron\u003c\/li\u003e\n\u003cli\u003eManganese\u003c\/li\u003e\n\u003cli\u003eMolybdenum\u003c\/li\u003e\n\u003cli\u003eRubidium\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\u003eReef aquariums with growing coral colonies\u003c\/li\u003e\n\u003cli\u003eSystems with coralline algae growth\u003c\/li\u003e\n\u003cli\u003eMarine aquariums containing clams or other calcifying invertebrates\u003c\/li\u003e\n\u003cli\u003eNano and medium reef aquariums\u003c\/li\u003e\n\u003cli\u003eManual two-part dosing\u003c\/li\u003e\n\u003cli\u003eAutomated aquarium dosing pumps\u003c\/li\u003e\n\u003cli\u003eCorrecting low calcium independently from alkalinity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDirections for Use\u003c\/h3\u003e\n\u003cp\u003eShake Seachem Reef Fusion 1 well before use. Add 1 mL for every 6.5 US gallons of aquarium water every one to two days.\u003c\/p\u003e\n\u003cp\u003eAdd Reef Fusion 1 to an area of strong water movement so it disperses rapidly throughout the aquarium. Wait several minutes, then add the same amount of Reef Fusion 2 in the same manner.\u003c\/p\u003e\n\u003cp\u003eWhenever practical, add Reef Fusion 1 and Reef Fusion 2 in separate high-flow locations. Never combine the concentrated liquids in the same dosing container, measuring cup, or reservoir.\u003c\/p\u003e\n\u003ch3\u003eApproximate Standard Dosage Guide\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-Gallon Aquarium:\u003c\/strong\u003e Approximately 0.8 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Gallon Aquarium:\u003c\/strong\u003e Approximately 1.5 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20-Gallon Aquarium:\u003c\/strong\u003e Approximately 3.1 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30-Gallon Aquarium:\u003c\/strong\u003e Approximately 4.6 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40-Gallon Aquarium:\u003c\/strong\u003e Approximately 6.2 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e55-Gallon Aquarium:\u003c\/strong\u003e Approximately 8.5 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75-Gallon Aquarium:\u003c\/strong\u003e Approximately 11.5 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100-Gallon Aquarium:\u003c\/strong\u003e Approximately 15.4 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e125-Gallon Aquarium:\u003c\/strong\u003e Approximately 19.2 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e150-Gallon Aquarium:\u003c\/strong\u003e Approximately 23.1 mL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese amounts are proportional calculations based on the standard dose of 1 mL per 6.5 gallons. Calculate dosing from the aquarium’s estimated actual water volume after accounting for rock, sand, decorations, and equipment displacement.\u003c\/p\u003e\n\u003ch3\u003eHow Much Does the Standard Dose Add?\u003c\/h3\u003e\n\u003cp\u003eWhen Reef Fusion 1 is used at the standard dose of 1 mL per 6.5 gallons, it contributes approximately 4 mg\/L of calcium.\u003c\/p\u003e\n\u003cp\u003eWhen the matching standard dose of Reef Fusion 2 is added, it contributes approximately 0.176 meq\/L of alkalinity. Using both components in equal quantities helps replace calcium and carbonate alkalinity consumed by calcifying reef organisms.\u003c\/p\u003e\n\u003ch3\u003eRecommended Calcium Level\u003c\/h3\u003e\n\u003cp\u003eSeachem recommends maintaining reef aquarium calcium between approximately 380 and 420 mg\/L. Test calcium regularly and adjust the amount or frequency of Reef Fusion 1 according to measured consumption.\u003c\/p\u003e\n\u003cp\u003eA reef aquarium’s calcium demand can change as corals grow, new livestock is added, lighting changes, or calcification rates increase. Avoid assuming that one fixed dose will remain appropriate indefinitely.\u003c\/p\u003e\n\u003ch3\u003eUsing Reef Fusion 1 with Reef Fusion 2\u003c\/h3\u003e\n\u003cp\u003eReef Fusion 1 supplies calcium and supporting elements. Reef Fusion 2 supplies carbonate and bicarbonate alkalinity. Together, they form a complete two-part system for maintaining the two major components consumed during reef calcification.\u003c\/p\u003e\n\u003cp\u003eThe products are designed to be dosed in a 1:1 ratio when calcium and alkalinity are being consumed proportionally. For example, if the aquarium receives 5 mL of Reef Fusion 1, it would normally also receive 5 mL of Reef Fusion 2.\u003c\/p\u003e\n\u003cp\u003eWait several minutes between components and add them separately to high-flow areas. Never pour the concentrated products together because calcium and carbonate can react and form an insoluble precipitate.\u003c\/p\u003e\n\u003ch3\u003eCan Reef Fusion 1 Be Used Separately?\u003c\/h3\u003e\n\u003cp\u003eYes. Reef Fusion 1 and Reef Fusion 2 may be used separately when the aquarium’s calcium and alkalinity levels are imbalanced.\u003c\/p\u003e\n\u003cp\u003eFor example, if calcium is below the desired range while alkalinity is already correct, Reef Fusion 1 may be dosed independently to raise calcium. Once the levels are balanced, equal dosing may resume based on the aquarium’s ongoing consumption.\u003c\/p\u003e\n\u003cp\u003eTest both calcium and alkalinity before making separate corrections. Adding equal amounts to an already imbalanced aquarium may move one parameter outside the desired range.\u003c\/p\u003e\n\u003ch3\u003eMaximum Daily Dose\u003c\/h3\u003e\n\u003cp\u003eDo not exceed 4 mL of Reef Fusion 1 per 6.5 gallons in a single day.\u003c\/p\u003e\n\u003cp\u003eLarge calcium adjustments should be made gradually. Rapid changes can stress corals and other reef invertebrates and may increase the chance of overshooting the desired calcium level.\u003c\/p\u003e\n\u003ch3\u003eUsing Reef Fusion with a Dosing Pump\u003c\/h3\u003e\n\u003cp\u003eReef Fusion 1 and Reef Fusion 2 may be dispensed with separate dosing-pump channels. Each component must have its own tubing, reservoir, and dosing head.\u003c\/p\u003e\n\u003cp\u003eProgram the pump to dose the two parts at different times or into separate high-flow locations. This reduces the likelihood of the concentrated products contacting each other before they disperse.\u003c\/p\u003e\n\u003cp\u003eDivide the aquarium’s required daily dose into several smaller additions when practical. Smaller doses can improve parameter stability in reef systems with high calcium and alkalinity consumption.\u003c\/p\u003e\n\u003ch3\u003eManual Dosing Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShake Reef Fusion 1 before each use\u003c\/li\u003e\n\u003cli\u003eTest calcium and alkalinity before beginning a dosing routine\u003c\/li\u003e\n\u003cli\u003eCalculate dosage using actual aquarium water volume\u003c\/li\u003e\n\u003cli\u003eAdd the product to a strong-flow area\u003c\/li\u003e\n\u003cli\u003eWait several minutes before adding Reef Fusion 2\u003c\/li\u003e\n\u003cli\u003eUse separate measuring tools for each component\u003c\/li\u003e\n\u003cli\u003eNever mix Reef Fusion 1 and Reef Fusion 2 directly\u003c\/li\u003e\n\u003cli\u003eMake large corrections gradually\u003c\/li\u003e\n\u003cli\u003eKeep a dosing and testing log\u003c\/li\u003e\n\u003cli\u003eRecalculate demand as coral growth increases\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSigns of Low Calcium\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReduced skeletal growth in stony corals\u003c\/li\u003e\n\u003cli\u003eSlow coralline algae development\u003c\/li\u003e\n\u003cli\u003eDeclining calcium test results between water changes\u003c\/li\u003e\n\u003cli\u003eDifficulty maintaining stable calcium in a heavily stocked reef\u003c\/li\u003e\n\u003cli\u003eIncreasing calcium demand as coral colonies grow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eVisual symptoms alone cannot confirm low calcium. Test calcium with a reliable marine aquarium test kit before changing the dosage.\u003c\/p\u003e\n\u003ch3\u003eUnderstanding Calcium \u0026amp; Alkalinity Balance\u003c\/h3\u003e\n\u003cp\u003eCalcium and carbonate alkalinity are both consumed when corals and other calcifying organisms build calcium carbonate skeletons. If either parameter becomes deficient, calcification and reef growth may be limited.\u003c\/p\u003e\n\u003cp\u003eCalcium and alkalinity also interact chemically. Adding excessive calcium may contribute to alkalinity precipitation, while excessive alkalinity may reduce available calcium. Balanced testing and dosing are more effective than adjusting one parameter without monitoring the other.\u003c\/p\u003e\n\u003ch3\u003eSupporting Elements in Reef Fusion 1\u003c\/h3\u003e\n\u003cp\u003eIn addition to calcium, Reef Fusion 1 contains biologically appropriate amounts of magnesium, strontium, boron, iron, manganese, molybdenum, and rubidium.\u003c\/p\u003e\n\u003cp\u003eThese elements are included as part of the complete Reef Fusion system. Reef Fusion 1 should not automatically replace dedicated magnesium or trace-element supplementation when testing shows that a separate correction is required.\u003c\/p\u003e\n\u003ch3\u003eImportant Reef Aquarium Note\u003c\/h3\u003e\n\u003cp\u003eReef Fusion 1 is a concentrated calcium supplement and is not a complete salt mix, water conditioner, coral food, or replacement for regular water changes.\u003c\/p\u003e\n\u003cp\u003eHealthy coral growth also depends on stable salinity, temperature, alkalinity, magnesium, nutrients, lighting, water flow, and overall aquarium maturity.\u003c\/p\u003e\n\u003cp\u003eTest calcium and alkalinity regularly. Heavily stocked SPS aquariums may require daily dosing, while lightly stocked or newer systems may require significantly less.\u003c\/p\u003e\n\u003cp\u003eDo not increase dosing solely because coral growth or coloration appears poor. Similar symptoms may be caused by unstable alkalinity, inadequate lighting, low nutrients, excessive nutrients, pests, disease, or improper water flow.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is Seachem Reef Fusion 1 used for?\u003c\/strong\u003e\u003cbr\u003eReef Fusion 1 supplies concentrated ionic calcium and supporting elements for saltwater reef aquariums.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Reef Fusion 1 calcium or alkalinity?\u003c\/strong\u003e\u003cbr\u003eReef Fusion 1 is the calcium component. Reef Fusion 2 is the alkalinity component.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow concentrated is Reef Fusion 1?\u003c\/strong\u003e\u003cbr\u003eIt contains 100,000 mg\/L of ionic calcium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much Reef Fusion 1 should I dose?\u003c\/strong\u003e\u003cbr\u003eUse 1 mL for every 6.5 US gallons every one to two days, then adjust according to testing and aquarium demand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much calcium does the standard dose add?\u003c\/strong\u003e\u003cbr\u003eThe standard dose raises calcium by approximately 4 mg\/L.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould Reef Fusion 1 and 2 be dosed equally?\u003c\/strong\u003e\u003cbr\u003eThey are designed for a 1:1 dosing ratio when calcium and alkalinity are being consumed evenly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan Reef Fusion 1 be used without Reef Fusion 2?\u003c\/strong\u003e\u003cbr\u003eYes. It may be used independently when calcium is low but alkalinity is already within the desired range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan Reef Fusion 1 and 2 be mixed together?\u003c\/strong\u003e\u003cbr\u003eNo. Never mix the concentrated products directly. Add them separately and wait several minutes between doses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere should Reef Fusion 1 be added?\u003c\/strong\u003e\u003cbr\u003eAdd it to a high-flow area of the aquarium so it disperses quickly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat calcium level should I maintain?\u003c\/strong\u003e\u003cbr\u003eSeachem recommends maintaining calcium between approximately 380 and 420 mg\/L.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum daily dose?\u003c\/strong\u003e\u003cbr\u003eDo not exceed 4 mL per 6.5 gallons in one day.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Reef Fusion 1 contain magnesium?\u003c\/strong\u003e\u003cbr\u003eYes. It contains magnesium along with strontium, boron, iron, manganese, molybdenum, and rubidium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan Reef Fusion 1 be used with a dosing pump?\u003c\/strong\u003e\u003cbr\u003eYes. Use a dedicated pump channel and separate tubing from Reef Fusion 2.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Reef Fusion 1 safe for reef aquariums?\u003c\/strong\u003e\u003cbr\u003eYes. It is formulated specifically for reef aquariums and calcifying marine organisms when used according to the directions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Reef Fusion 1 replace water changes?\u003c\/strong\u003e\u003cbr\u003eNo. It supplements calcium and supporting elements but does not replace regular water changes or complete reef maintenance.\u003c\/p\u003e\n\u003ch3\u003eAvailable at Tropical Treasures Wyo\u003c\/h3\u003e\n\u003cp\u003eSeachem Reef Fusion 1 500 mL provides highly concentrated ionic calcium and supporting elements for coral growth and balanced reef aquarium chemistry. Pair it with Seachem Reef Fusion 2 for a complete two-part calcium and alkalinity dosing system.\u003c\/p\u003e\n\u003cp\u003eVisit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop Seachem reef supplements, calcium and alkalinity test kits, dosing pumps, marine filtration, coral foods, and saltwater aquarium care essentials.\u003c\/p\u003e","brand":"Tropical Treasures Wyo LLC","offers":[{"title":"Default Title","offer_id":53005147177173,"sku":null,"price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/4545\/8133\/files\/SC12030-2T.png?v=1784986610","url":"https:\/\/tropicaltreasureswyo.com\/products\/seachem-reef-fusion-1-500ml","provider":"Tropical Treasures Wyo LLC","version":"1.0","type":"link"}