{"product_id":"brightwell-magnesion-magnesium","title":"Brightwell Aquatics Magnesion","description":"\u003cp\u003e\u003cstrong\u003eBrightwell Magnesion\u003c\/strong\u003e is a concentrated liquid magnesium supplement for reef aquariums. Magnesium is the quiet workhorse of reef chemistry: it keeps calcium and alkalinity in solution so they stay available to your corals instead of precipitating out. Hold it in range alongside \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/brightwell-reef-code-a-calcium\"\u003eReef Code A\u003c\/a\u003e and \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/brightwell-reef-code-b-alkalinity\"\u003eReef Code B\u003c\/a\u003e, and browse more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/brightwell-aquatics\"\u003eBrightwell Aquatics\u003c\/a\u003e reef care.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eWhy Magnesium Matters\u003c\/h3\u003e\n\u003cp\u003eNatural seawater holds magnesium at about 1,290 to 1,320 ppm, roughly three times the level of calcium. At that concentration it stops calcium and carbonate from bonding and falling out of solution. If magnesium drifts low, dosing calcium and alkalinity becomes inefficient, your numbers get hard to hold, and precipitation can cloud the water or coat your equipment. Keeping magnesium in range is what makes the rest of your dosing work.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConcentrated liquid magnesium for marine and reef aquariums\u003c\/li\u003e\n\u003cli\u003eKeeps calcium and alkalinity stable and available to corals\u003c\/li\u003e\n\u003cli\u003eEach ml raises magnesium in 1 gallon by about 26 ppm\u003c\/li\u003e\n\u003cli\u003eReef safe, with no phosphate or nitrate\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eDirections for Use\u003c\/h3\u003e\n\u003cp\u003eShake well before use and test your magnesium before dosing. For maintenance, add 5 ml (1 capful) per 20 gallons every other day, or as needed, to hold magnesium between 1,290 and 1,320 ppm. Each ml raises magnesium in 1 gallon by about 26 ppm. If magnesium is below 1,288 ppm, you can dose up to 10 ml per 20 gallons daily until it reaches your target, then return to maintenance dosing. Used for maintenance, 250 ml treats up to 1,000 gallons.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eChoose Your Size\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:6px 0;font-size:0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#E0F7FA;\"\u003e\n\u003cth style=\"border:1px solid #B2EBF2;padding:5px 8px;text-align:left;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"border:1px solid #B2EBF2;padding:5px 8px;text-align:left;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003e250 ml\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eNano and smaller reef tanks, or occasional magnesium top-ups.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003e500 ml\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eMid-size reef tanks on a regular dosing schedule.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003e2 L\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eLarger or coral-heavy systems, with the best value per ml.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:6px 0;font-size:0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eBrightwell Aquatics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eMagnesion, liquid magnesium supplement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eRaises\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eAbout 26 ppm magnesium per ml, per gallon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eTarget range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e1,290 to 1,320 ppm magnesium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eUse with\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eReef Code A and Reef Code B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eBest for\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eSaltwater reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eAvailable sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e250 ml, 500 ml, 2 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eReef safe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003e\u003cstrong\u003eCountry of origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:5px 8px;\"\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/brightwell-reef-code-a-calcium\"\u003eReef Code A\u003c\/a\u003e supplies calcium in the balanced two-part system.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/brightwell-reef-code-b-alkalinity\"\u003eReef Code B\u003c\/a\u003e supplies alkalinity in the balanced two-part system.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/brightwell-aquatics\"\u003eBrightwell Aquatics\u003c\/a\u003e is the full brand lineup.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eAdditives and supplements\u003c\/a\u003e for more reef dosing options.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do I need to dose magnesium?\u003c\/strong\u003e Magnesium keeps calcium and carbonate in solution. Without enough of it, dosing calcium and alkalinity becomes a losing battle because they precipitate out instead of feeding your corals. Correct magnesium makes your calcium and alkalinity dosing stable and efficient.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I test magnesium?\u003c\/strong\u003e Magnesium moves more slowly than calcium and alkalinity, so testing every week or two is usually enough for an established tank. Test before dosing and adjust to keep it in the 1,290 to 1,320 ppm range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Magnesion reef safe?\u003c\/strong\u003e Yes. It is formulated for reef aquariums and is safe for corals and other invertebrates when dosed to your test results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much will one dose raise my magnesium?\u003c\/strong\u003e Each ml raises magnesium in 1 gallon by about 26 ppm, so a 5 ml dose per 20 gallons nudges it up gradually. Correct low magnesium slowly rather than all at once.\u003c\/p\u003e","brand":"Brightwell Aquatics","offers":[{"title":"250 ml","offer_id":48742355501275,"sku":"MAG250","price":8.14,"currency_code":"USD","in_stock":true},{"title":"500 ml","offer_id":48742355534043,"sku":"MAG500","price":13.54,"currency_code":"USD","in_stock":true},{"title":"2 L","offer_id":48742355566811,"sku":"MAG2L","price":29.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_c56b6c64-14c6-498a-b90f-fa83cbbca857.jpg?v=1777900747","url":"https:\/\/squeakysaquatics.com\/products\/brightwell-magnesion-magnesium","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}