{"product_id":"red-sea-reef-spec-carbon","title":"Red Sea Reef Spec Carbon","description":"\u003cp\u003e\u003cstrong\u003eClear, yellow-free reef water without the phosphate trade-off.\u003c\/strong\u003e Red Sea Reef-Spec Carbon is a low-dust, low-phosphate activated carbon that strips dissolved organics and the yellowing compounds that dull reef lighting, without leaching phosphate back into a phosphate-sensitive system. It comes in four pack sizes — 200 mL, 500 mL, 1000 mL and 2000 mL — to suit anything from a nano reef to a large display.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-low phosphate leaching\u003c\/strong\u003e — rated below 0.000001 g of phosphate per mL, so it won't undo your reef's nutrient control while it works.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow dust\u003c\/strong\u003e — minimal rinsing before use and no black clouding on start-up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh adsorption capacity\u003c\/strong\u003e — rated at up to 1,000 mg of small organic molecules per gram, which is what actually clears yellow tint and dissolved odours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine 0.6–2.3 mm granules\u003c\/strong\u003e pack densely enough to work in a small reactor without channelling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour pack sizes\u003c\/strong\u003e so you can match the dose to your system without buying more than you'll use before it exhausts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003eBarcode\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e200 mL\u003c\/td\u003e\n\u003ctd\u003eRED533\u003c\/td\u003e\n\u003ctd\u003e7290100775950\u003c\/td\u003e\n\u003ctd\u003e$13.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 mL\u003c\/td\u003e\n\u003ctd\u003eRED528\u003c\/td\u003e\n\u003ctd\u003e7290100775806\u003c\/td\u003e\n\u003ctd\u003e$22.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1000 mL\u003c\/td\u003e\n\u003ctd\u003eRED529\u003c\/td\u003e\n\u003ctd\u003e7290100775813\u003c\/td\u003e\n\u003ctd\u003e$38.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2000 mL\u003c\/td\u003e\n\u003ctd\u003eRED531\u003c\/td\u003e\n\u003ctd\u003e7290100775820\u003c\/td\u003e\n\u003ctd\u003e$60.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eGranule size 0.6–2.3 mm. Adsorption capacity approximately 1,000 mg\/g for small organic molecules and 280 mg\/g for large organic molecules. Phosphate leaching below 0.000001 g per mL. Fresh and marine, reef safe.\u003c\/p\u003e\u003ch3\u003eWhich size do I need?\u003c\/h3\u003e\u003cp\u003eRed Sea doses this carbon at approximately 100 mL per 200 L of system water for general clarity and yellow-tint removal, replaced every 6–8 weeks or once it's visibly reduced to about half its original volume. For heavier post-medication clean-up, double that to 200 mL per 200 L, run for about a week. Run it in a media bag or reactor with 1,000–1,500 L\/h of flow per 50 g (roughly 100 mL) of carbon.\u003c\/p\u003e\u003cp\u003eScaled against that dose rate, here's what each pack treats through one carbon cycle, and what that works out to per litre of tank water:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003cth\u003eTreats per cycle\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003eCost per litre treated\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e200 mL\u003c\/td\u003e\n\u003ctd\u003e~400 L\u003c\/td\u003e\n\u003ctd\u003e$13.50\u003c\/td\u003e\n\u003ctd\u003e3c per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 mL\u003c\/td\u003e\n\u003ctd\u003e~1,000 L\u003c\/td\u003e\n\u003ctd\u003e$22.50\u003c\/td\u003e\n\u003ctd\u003e2c per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1000 mL\u003c\/td\u003e\n\u003ctd\u003e~2,000 L\u003c\/td\u003e\n\u003ctd\u003e$38.00\u003c\/td\u003e\n\u003ctd\u003e1c per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2000 mL\u003c\/td\u003e\n\u003ctd\u003e~4,000 L\u003c\/td\u003e\n\u003ctd\u003e$60.00\u003c\/td\u003e\n\u003ctd\u003e1c per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThe 1000 mL and 2000 mL packs work out cheapest per litre treated — buy a smaller size for a nano tank you don't want sitting on an opened pack for months, and step up once your system is over roughly 1,000 L in total volume.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eRinse briefly before use to settle any fine dust. Run in a media bag or reactor, not loose in a sump. Replace on schedule rather than waiting for it to visibly fail — exhausted carbon stops adsorbing well before it looks used up, and old carbon left in the flow path can start releasing what it's already trapped.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for reef, FOWLR and freshwater systems where you want clearer water and controlled phosphate. Not a substitute for a dedicated phosphate remover if your issue is elevated phosphate rather than dissolved organics and tint — pair it with a phosphate-specific media for that job.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cp\u003ePairs with a Red Sea Reef-Spec media bag to keep granules contained in a sump, or a media reactor where you want guaranteed flow through the bed rather than around it.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eConsumable filter media, sold as new stock — not covered by a mechanical warranty, in addition to your rights under Australian Consumer Law. Ships as standard parcel freight.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eCan I run this loose in my sump instead of a media bag?\u003c\/h4\u003e\u003cp\u003eYou can, but a media bag or reactor keeps the granules from spreading through your system and makes replacement straightforward. Loose carbon is harder to fully remove later.\u003c\/p\u003e\u003ch4\u003eHow do I know when it's exhausted?\u003c\/h4\u003e\u003cp\u003eWatch the calendar rather than the water — carbon usually stops working well before the water looks any different. Replace every 6–8 weeks, or once the pack has visibly reduced to about half its original volume.\u003c\/p\u003e\u003ch4\u003eWill it affect my corals?\u003c\/h4\u003e\u003cp\u003eNo — it's formulated with very low phosphate leaching specifically for reef systems, so used and replaced on schedule it shouldn't push phosphate into your water.\u003c\/p\u003e\u003ch4\u003eDoes it work in freshwater tanks?\u003c\/h4\u003e\u003cp\u003eYes, it's suitable for both freshwater and marine systems.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"200ml","offer_id":54774156755235,"sku":"RED533","price":13.5,"currency_code":"AUD","in_stock":false},{"title":"500ml","offer_id":55335138722083,"sku":"RED528","price":22.5,"currency_code":"AUD","in_stock":false},{"title":"1000ml","offer_id":55335138754851,"sku":"RED529","price":38.0,"currency_code":"AUD","in_stock":true},{"title":"2000ml","offer_id":55335138787619,"sku":"RED531","price":60.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/RED533.png?v=1772078726","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/red-sea-reef-spec-carbon","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}