{"product_id":"red-sea-nopox","title":"NO3:PO4-X 500 ml to 5 L — NoPox Nitrate and Phosphate Reducer for Reef Aquariums - Red Sea","description":"\u003ch2\u003eNO3:PO4-X: biological nitrate and phosphate reduction\u003c\/h2\u003e\n\u003cp\u003eRed Sea \u003cstrong\u003eNO3:PO4-X\u003c\/strong\u003e — \u003cstrong\u003eNoPox\u003c\/strong\u003e to the hobby — is a complex of carbon sources and organically bound elements that lowers \u003cstrong\u003enitrate (NO3)\u003c\/strong\u003e and \u003cstrong\u003ephosphate (PO4)\u003c\/strong\u003e together in a reef aquarium. Available here in 500 ml, 1 L and 5 L — pick your size right on this page.\u003c\/p\u003e\n\n\u003ch2\u003eHow it works\u003c\/h2\u003e\n\u003cp\u003eEach carbon source in the formula feeds a different strain of micro-organism. With balanced enzymatic co-factors, those sources drive complete denitrification alongside phosphate reduction. The product is safe for fish, corals and microfauna.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe manufacturer's critical point:\u003c\/strong\u003e efficient protein skimming is essential to the safe use of NO3:PO4-X. Red Sea states that even a significant accidental overdose causes no irreversible damage \u003cem\u003eas long as an adequately sized skimmer is running\u003c\/em\u003e. If yours is borderline for the volume, sort that out first — see the \u003ca href=\"\/en\/products\/red-sea-rsk-600-reefer-skimmer\"\u003eRSK 600 Reefer Skimmer\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eOfficial Red Sea daily dose (per 100 L \/ 25 gal)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\u003cth\u003eSystem type\u003c\/th\u003e\u003cth\u003eTarget NO3\u003c\/th\u003e\u003cth\u003eTarget PO4\u003c\/th\u003e\u003cth\u003eDaily dose\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMixed Reef\u003c\/td\u003e\u003ctd\u003e1 to 2 ppm\u003c\/td\u003e\u003ctd\u003e0.08 to 0.12 ppm\u003c\/td\u003e\u003ctd\u003e2 ml\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSPS Frag\u003c\/td\u003e\u003ctd\u003e1 to 2 ppm\u003c\/td\u003e\u003ctd\u003e0.08 to 0.12 ppm\u003c\/td\u003e\u003ctd\u003e2 ml\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSPS Dominant\u003c\/td\u003e\u003ctd\u003e0.25 to 0.5 ppm\u003c\/td\u003e\u003ctd\u003e0.01 to 0.02 ppm\u003c\/td\u003e\u003ctd\u003e1 to 2 ml\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUltra Low Nutrient SPS\u003c\/td\u003e\u003ctd\u003e0 ppm\u003c\/td\u003e\u003ctd\u003e0 ppm\u003c\/td\u003e\u003ctd\u003e1 to 2 ml\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMarine Fish\u003c\/td\u003e\u003ctd\u003eunder 10 ppm\u003c\/td\u003e\u003ctd\u003eunder 1 ppm\u003c\/td\u003e\u003ctd\u003e3 ml\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eDosing is \u003cstrong\u003edaily\u003c\/strong\u003e; NO3 and PO4 are measured \u003cstrong\u003eweekly\u003c\/strong\u003e. A missed dose is never made up — simply resume at the current dose. At this size the dosing pump Red Sea recommends really earns its keep: the \u003ca href=\"\/en\/products\/red-sea-reefdose-doseurs-4-pompes\"\u003eReefDose 4\u003c\/a\u003e delivers the same dose to the millilitre, seven days a week.\u003c\/p\u003e\n\n\u003ch2\u003eWhat to measure with\u003c\/h2\u003e\n\u003cp\u003eNoPox is driven by test results, never by eye. For phosphate, the \u003ca href=\"\/en\/products\/hanna-checker-phosphate-ultra-low-range-hi-774\"\u003eHanna HI774 colorimeter\u003c\/a\u003e reads 0.00 to 0.90 ppm and returns a number instead of a shade to interpret. For nitrate, the \u003ca href=\"\/en\/products\/salifert-nitrate-test-kit\"\u003eSalifert Nitrate test\u003c\/a\u003e and the \u003ca href=\"\/en\/products\/red-sea-algae-control-multi-test-kit-no3-po4\"\u003eRed Sea Algae Control kit\u003c\/a\u003e both do the job.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable sizes\u003c\/h2\u003e\n\u003cp\u003eRed Sea lists four sizes: 100ml, 500ml, 1L and 5L. The 500ml is the trial size, the 1L is the established-tank size for continuous dosing, and the 5L targets very large systems. All three are selectable on this page.\u003c\/p\u003e\n\n\u003ch2\u003eOur advice\u003c\/h2\u003e\n\u003cp\u003eIn 35 years in this trade, the question we hear most often is \"I have algae, what do I do?\" An algae problem is almost always a nutrient management problem: too much import, not enough export. You feed more than the system can process, and it builds up because nothing removes it. An aquarium is a closed vessel — nothing is lost, nothing is created. What you put in stays in.\u003c\/p\u003e\n\u003cp\u003eThe skimmer, the filtration, chemical media, phosphate removers, the refugium: all of that is what helps you export. But even with all that, when the skimmer isn't strong enough or the balance won't hold, NO3:PO4-X turbocharges your bacteria, which consume the nitrate and the phosphate.\u003c\/p\u003e\n\u003cp\u003eIt's a very good product, but be careful with it. You need to know the dosing, follow the instructions to the letter, and test your nitrate and phosphate constantly. This isn't a patch you apply once: when you start with it, you keep going, and you stay disciplined. But it works well.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNever dose blind.\u003c\/strong\u003e You adjust the dose based on what the tests tell you, not on impatience. For phosphate we prefer the Hanna testers — they're more reliable. For nitrate, the Red Sea is good, and we also like the Salifert.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe white veil:\u003c\/strong\u003e if you see a whitish veil appear, that's bacteria. Reduce the dose.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWho we steer away from it:\u003c\/strong\u003e the customer who doesn't want to look after their tank. Without follow-up, it's hard to succeed and hard to keep much livestock alive.\u003c\/p\u003e\n\n\u003ch2\u003eOfficial Red Sea videos\u003c\/h2\u003e\n\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%;margin:20px 0;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/Qqx0SIJgEN8\" title=\"Red Sea Reef Care - Algae Management Program\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;\" frameborder=\"0\" loading=\"lazy\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%;margin:20px 0;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/4W6tFm7rrFU\" title=\"Red Sea NO3:PO4-X NoPox - Tips and Tricks\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;\" frameborder=\"0\" loading=\"lazy\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhat tank size is the 1L for?\u003c\/h3\u003e\n\u003cp\u003eIt depends on the daily dose, not on volume alone. A 400 L Mixed Reef doses 8 ml per day per the official table, so a 1L bottle covers roughly four months at that rate. A Marine Fish system, which doses higher, goes through it faster.\u003c\/p\u003e\n\u003ch3\u003eIs NoPox safe for fish and corals?\u003c\/h3\u003e\n\u003cp\u003eRed Sea states the product is safe for fish, corals and microfauna, and that a significant accidental overdose causes no irreversible damage when an adequately sized skimmer is running.\u003c\/p\u003e\n\u003ch3\u003eHow often should I test?\u003c\/h3\u003e\n\u003cp\u003eThe manufacturer has you dose daily and measure NO3 and PO4 weekly.\u003c\/p\u003e\n\u003ch3\u003eCan I run it through a dosing pump?\u003c\/h3\u003e\n\u003cp\u003eYes — Red Sea itself recommends a dosing pump for consistent daily dosing.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/www.redseafish.com\/\" target=\"_blank\" rel=\"noopener\"\u003eManufacturer's official page\u003c\/a\u003e\u003c\/p\u003e","brand":"Red Sea","offers":[{"title":"1 L","offer_id":38010639909035,"sku":"R22204","price":53.99,"currency_code":"CAD","in_stock":true},{"title":"500 ml","offer_id":47559471497387,"sku":"R22203","price":36.99,"currency_code":"CAD","in_stock":true},{"title":"5 L","offer_id":47559471530155,"sku":"R22206","price":202.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/files\/NO3PO4X-1000ML-AND-BOX-1000x1000__04374.jpg?v=1703168761","url":"https:\/\/reefsolution.com\/en\/products\/red-sea-nopox","provider":"Reef Solution","version":"1.0","type":"link"}