{"product_id":"bioscape-seiryu-rock-20kg-box","title":"Seiryu Rock 20kg Box","description":"\u003cp\u003e\u003cstrong\u003eGrey, angular stone for full Iwagumi and mountain-style builds, sold by the 20 kg box.\u003c\/strong\u003e Bioscape Seiryu Rock 20 kg Box is a natural aquascaping stone in light-to-mid grey tones with fine white mineral veining and sharp, angular faces — the stone behind countless Iwagumi and nature-style layouts, supplied as a mixed box large enough for a full aquascape.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassic grey seiryu-style stone\u003c\/strong\u003e — sharp, angular faces with white mineral veining, suited to mountain-ridge and Iwagumi-style hardscapes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcareous — raises KH, GH and pH gradually\u003c\/strong\u003e — the trade-off for the look; wash thoroughly and bucket-test before committing it to a soft-water scape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 kg box of mixed pieces\u003c\/strong\u003e — enough for a full-tank Iwagumi build or several smaller layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach piece is unique\u003c\/strong\u003e — natural stone, so shape, weight and exact colouring vary piece to piece; the photo is representative, not the exact pieces you'll receive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSold as\u003c\/th\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003cth\u003eColour\u003c\/th\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e20 kg box, mixed pieces\u003c\/td\u003e\n\u003ctd\u003eNatural seiryu-style stone (calcareous)\u003c\/td\u003e\n\u003ctd\u003eLight-to-mid grey with white veining\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine safe\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eBioscape doesn't publish a piece count or individual piece dimensions for the box — it's a natural product and both vary between boxes. We're not printing a figure we can't confirm.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for full-tank freshwater and marine aquascapes, and for terrariums, where a hard, mineral-rich stone is wanted to build a complete Iwagumi or mountain-ridge layout. Not a good match for soft, acidic setups — seiryu-type stone is calcareous and will gradually raise KH, GH and pH as it weathers, which makes it a poor choice for species that need soft water, such as many tetras, wild-caught shrimp and Apistogramma, or for plant-heavy layouts relying on low mineral content.\u003c\/p\u003e\n\u003ch3\u003ePreparation\u003c\/h3\u003e\n\u003cp\u003eRinse the box thoroughly before use — a 20 kg box carries a lot of stone dust from handling and transport. Because it's calcareous, it's worth bucket-testing a piece first — leave it in a container of your tap or RO water for a few days and check KH, GH and pH before and after, so you know what to expect once the full build is in the display tank.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered against being not as described under Australian Consumer Law. As a natural product, the pieces you receive will vary from the listing photo in shape, colour and exact weight — that's expected, not a fault. Sold and freighted as a 20 kg box.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWill this raise my water hardness?\u003c\/h4\u003e\n\u003cp\u003eYes, gradually. Seiryu-style stone is calcareous and slowly releases calcium carbonate, raising KH, GH and pH over time. Wash it well and bucket-test a piece first if you're running a soft-water tank.\u003c\/p\u003e\n\u003ch4\u003eShould I buy the box or the single piece?\u003c\/h4\u003e\n\u003cp\u003eThe 20 kg box is sized for a full aquascape build — a complete Iwagumi layout or a large paludarium. The single-piece listing suits topping up an existing scape or picking one specific shape rather than committing to a full box.\u003c\/p\u003e\n\u003ch4\u003eIs it safe for shrimp?\u003c\/h4\u003e\n\u003cp\u003eIt's not ideal for wild-caught or soft-water shrimp species, since the hardness rise it causes suits harder-water setups better than soft, acidic ones. Hardier, harder-water-tolerant shrimp are generally fine with it.\u003c\/p\u003e\n\u003ch4\u003eWill I get the exact pieces shown in the photo?\u003c\/h4\u003e\n\u003cp\u003eNo — this is a 20 kg box of natural pieces, and the photo is representative of the stone type and colour range, not a guarantee of the specific pieces you'll receive.\u003c\/p\u003e","brand":"Bioscape","offers":[{"title":"Default Title","offer_id":54774341304611,"sku":"ROCK02","price":188.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/bioscape-seiryu-rock-20kg-bo-43876774379811.webp?v=1790239540","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/bioscape-seiryu-rock-20kg-box","provider":"Nicks AOT","version":"1.0","type":"link"}