{"product_id":"bioscape-breakwater-brown-coarse-2-4mm","title":"Bioscape Breakwater Brown Coarse 2-4mm","description":"\u003cp\u003e\u003cstrong\u003eA natural coarse gravel base that won't push your water chemistry around.\u003c\/strong\u003e Bioscape Breakwater Brown Coarse 2-4mm is a triple-washed, pH-neutral aquarium and terrarium substrate in an earthy brown tone, sized for use as a full tank base, an accent layer in an aquascape, or a drainage layer under a terrarium substrate.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWon't affect pH\u003c\/strong\u003e — an inert gravel, so it won't push your water chemistry away from what your fish or plants are already set up for.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple washed\u003c\/strong\u003e — less dust to settle out than an unwashed gravel, though we'd still recommend a quick rinse before adding it, since transit and handling can stir dust back up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoarse 2-4mm grade\u003c\/strong\u003e — chunky enough to resist compacting flat and to let water and root-tab fertilisers move through it, unlike a fine sand grade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks as a base or an accent\u003c\/strong\u003e — use it as the full substrate, as a contrast layer against a lighter gravel or soil, or as a terrarium drainage layer under a bioactive substrate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\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\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e3 kg\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e9327975044541\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7 kg\u003c\/td\u003e\n\u003ctd\u003eBIS96\u003c\/td\u003e\n\u003ctd\u003e9327975044572\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eGrade: coarse, 2-4mm grain size. Colour: brown. Material: natural gravel, inert (does not affect pH). Bioscape hasn't published a depth-per-bag coverage figure for this grade — as a guide, dry-fill a footprint you can measure before committing to a full layout, since the depth you end up with depends on how deep and how tightly you pack it.\u003c\/p\u003e\n\u003ch3\u003eWhich grade do I need?\u003c\/h3\u003e\n\u003cp\u003eBioscape sells the Breakwater Brown range in more than one grade, so it's worth checking you've got the right one before ordering:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eGrain size\u003c\/th\u003e\n\u003cth\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/bioscape-breakwater-brown-fine-1-2mm\"\u003eBreakwater Brown Fine 1-2mm\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e1-2mm\u003c\/td\u003e\n\u003ctd\u003ePlanted tanks and tight root beds, a smoother look\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreakwater Brown Coarse 2-4mm (this product)\u003c\/td\u003e\n\u003ctd\u003e2-4mm\u003c\/td\u003e\n\u003ctd\u003eGeneral base substrate, better water flow through the bed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/bioscape-breakwater-brown-coarse-3-5mm-7kg-bag\"\u003eBreakwater Brown Coarse 3-5mm\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e3-5mm\u003c\/td\u003e\n\u003ctd\u003eChunkier hardscape base, least prone to compacting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e freshwater and marine aquariums, planted tanks as a base or accent, and as a drainage layer under bioactive terrarium substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e setups that need an active, buffering substrate — this gravel is inert, so it won't raise KH or hardness the way a cichlid-specific substrate would, and it won't lower pH the way an aquasoil does.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eRinse before use, even though it's triple washed — a few minutes under a hose or in a bucket clears any dust picked up in transit and stops the tank clouding on fill. Once it's in the tank, an occasional gravel vacuum during water changes is all coarse gravel like this needs; it doesn't need replacing on any schedule.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eAny fault on arrival — a torn bag or contamination — is covered under your consumer guarantee rights under Australian Consumer Law. As a natural material, colour and exact grain mix vary a little bag to bag; the product photo is representative rather than exact.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWill this gravel change my water's pH or hardness?\u003c\/h4\u003e\n\u003cp\u003eNo. It's an inert gravel, so it won't push pH, KH or general hardness in either direction.\u003c\/p\u003e\n\u003ch4\u003eDo I need to rinse it before adding it to my tank?\u003c\/h4\u003e\n\u003cp\u003eIt's triple washed at the factory, but we'd still rinse it — a quick rinse clears any dust from transit and handling and saves you a cloudy tank on day one.\u003c\/p\u003e\n\u003ch4\u003eHow much do I need for my tank?\u003c\/h4\u003e\n\u003cp\u003eBioscape hasn't published an exact coverage figure for this grade, and coverage depends on how deep you're going, so test-fill a small measured area first if you want to work out quantity precisely rather than guessing on a full tank.\u003c\/p\u003e\n\u003ch4\u003eCan I use this in a terrarium?\u003c\/h4\u003e\n\u003cp\u003eYes — it's commonly used as a drainage layer under a bioactive terrarium substrate, as well as in aquariums.\u003c\/p\u003e\n\u003ch4\u003eWhat's the difference between this and the Fine grade?\u003c\/h4\u003e\n\u003cp\u003eGrain size — this is 2-4mm, the Fine grade is 1-2mm. The coarser grade compacts less and lets more water move through the bed, while the Fine grade gives a smoother look and suits tighter root systems.\u003c\/p\u003e","brand":"Bioscape","offers":[{"title":"3 kg","offer_id":55249198121251,"sku":null,"price":16.95,"currency_code":"AUD","in_stock":true},{"title":"7 kg","offer_id":55249198154019,"sku":"BIS96","price":34.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/BIS91_1.jpg?v=1772087742","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/bioscape-breakwater-brown-coarse-2-4mm","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}