{"product_id":"bioscape-pastel-bronze-coarse-2-4mm","title":"Bioscape Pastel Bronze Coarse 2-4mm","description":"\u003cp\u003e\u003cstrong\u003eA warm bronze aquarium gravel that works in fresh and saltwater.\u003c\/strong\u003e Bioscape Pastel Bronze Coarse is a 2-4 mm inert gravel in soft bronze tones, sized for a natural aquascape base under plants, fish and bottom-dwelling species. It's sold in 3 kg and 7 kg bags.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInert\u003c\/strong\u003e — won't shift pH or KH, so it's safe to use as a purely decorative base in any water chemistry you're already running.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoarse 2-4 mm grain\u003c\/strong\u003e — chunkier than Bioscape's Fine 1-2 mm grade, so it packs less tightly and lets water and root-tab nutrients move through more freely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarm bronze tone\u003c\/strong\u003e — a soft, natural colour that suits both planted freshwater aquascapes and marine or brackish setups without looking artificial.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and marine safe\u003c\/strong\u003e — the same bag works across freshwater, brackish and marine tanks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGrain size\u003c\/th\u003e\n\u003cth\u003eColour\u003c\/th\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003cth\u003eBag sizes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eCoarse, 2-4 mm\u003c\/td\u003e\n\u003ctd\u003ePastel bronze\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003ctd\u003e3 kg, 7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhich grade do I need?\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003ePastel Bronze Coarse (this bag)\u003c\/th\u003e\n\u003cth\u003ePastel Bronze Fine\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrain size\u003c\/td\u003e\n\u003ctd\u003e2-4 mm\u003c\/td\u003e\n\u003ctd\u003e1-2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eOpen-bottom layouts, bottom feeders, better flow-through for root tabs\u003c\/td\u003e\n\u003ctd\u003eSand-like look, corydoras and other fine-substrate species\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for freshwater planted tanks, community aquariums, brackish setups and marine display tanks where a bronze-toned base suits the aquascape. Not intended for species that need a soft, sand-fine substrate to dig or sift through — choose the Fine 1-2 mm grade for those tanks instead.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eAs with any new substrate, rinse it thoroughly under running water before adding it to the tank to settle dust and fines. Being inert, it doesn't need replacing on a schedule and won't affect water chemistry over time.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered against manufacturing defects under Bioscape's warranty, in addition to your rights under Australian Consumer Law. Ships by standard parcel post; the 7 kg bag is heavier freight than most decor items, so allow for that in a multi-item order.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWill this gravel change my water chemistry?\u003c\/h4\u003e\u003cp\u003eNo. Bioscape Pastel Bronze Coarse is inert and doesn't buffer pH or add hardness, so it's a purely decorative substrate choice.\u003c\/p\u003e\u003ch4\u003eCan I use it in a marine or reef tank?\u003c\/h4\u003e\u003cp\u003eYes, Bioscape markets this gravel as safe for both freshwater and marine setups.\u003c\/p\u003e\u003ch4\u003eHow much do I need for my tank?\u003c\/h4\u003e\u003cp\u003eBioscape doesn't publish a coverage figure for this bag, so the safest approach is to buy based on your tank's footprint and desired depth, and top up with a second bag if needed — coarse gravel is easy to add to gradually.\u003c\/p\u003e\u003ch4\u003eDoes it need rinsing before use?\u003c\/h4\u003e\u003cp\u003eYes — rinse under running water until it runs clear, the same as any new aquarium substrate.\u003c\/p\u003e","brand":"Bioscape","offers":[{"title":"3 kg","offer_id":55249198186787,"sku":null,"price":16.95,"currency_code":"AUD","in_stock":true},{"title":"7 kg","offer_id":55249198219555,"sku":"BIS97","price":34.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/BIS92_1.jpg?v=1772087834","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/bioscape-pastel-bronze-coarse-2-4mm","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}