{"product_id":"as-aquaristik-airstone-vario-m-250mm","title":"Airstone Vario M (250 mm)","description":"\u003cdiv class=\"ai-seo-content\"\u003e\n\n\u003ch2\u003eAirstone Vario M 250 mm – Fine Bubble Air Stone for Medium Aquarium Oxygenation\u003c\/h2\u003e\n\n\u003cp\u003eThe Airstone Vario M (250 mm) is a medium-length cylindrical air stone designed to deliver efficient, fine-bubble aeration across a wider section of the aquarium floor. At 250 mm (25 cm), it creates a longer bubble curtain compared to the compact S version, making it ideal for medium-sized tanks where broader water column coverage is beneficial for fish health, water circulation, and visual effect.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Vario M uses the same high-quality sintered mineral material as the Vario S, producing consistently fine, uniform bubbles that rise slowly through the water column for maximum oxygen dissolution. Its modular design allows end-to-end connection with other Vario airstones, enabling the creation of extended bubble walls of any length.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e250 mm length — ideal coverage for medium tanks (60–150 L range)\u003c\/li\u003e\n  \u003cli\u003eFine, uniform bubble production — maximum oxygen transfer per liter of air\u003c\/li\u003e\n  \u003cli\u003eDurable sintered mineral body — long service life, washable\u003c\/li\u003e\n  \u003cli\u003eModular connection — chain multiple units for extended bubble walls\u003c\/li\u003e\n  \u003cli\u003eStandard 4 mm airline connection\u003c\/li\u003e\n  \u003cli\u003eCreates even water circulation across a broader tank width\u003c\/li\u003e\n  \u003cli\u003eSuitable for freshwater and saltwater aquariums\u003c\/li\u003e\n  \u003cli\u003eDecorative visual effect — natural-looking bubble curtain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLength: 250 mm\u003c\/li\u003e\n  \u003cli\u003eType: cylindrical sintered air stone\u003c\/li\u003e\n  \u003cli\u003eAirline connection: 4 mm (standard)\u003c\/li\u003e\n  \u003cli\u003eBubble size: fine\u003c\/li\u003e\n  \u003cli\u003eMaterial: sintered mineral (ceramic-type porous stone)\u003c\/li\u003e\n  \u003cli\u003eModular end connection (end cap removable)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAquarium Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOxygenation for medium fish-only tanks (60–150 L)\u003c\/li\u003e\n  \u003cli\u003eBack-wall bubble curtain in display aquariums\u003c\/li\u003e\n  \u003cli\u003eNighttime aeration for planted tanks (60–120 L)\u003c\/li\u003e\n  \u003cli\u003eBreeding and fry tanks requiring gentle, broad aeration\u003c\/li\u003e\n  \u003cli\u003eMarine tanks benefiting from fine-bubble surface agitation\u003c\/li\u003e\n  \u003cli\u003eKoi and ornamental pond supplementary aeration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAll standard aquarium air pumps\u003c\/li\u003e\n  \u003cli\u003e4 mm inner diameter airline tubing\u003c\/li\u003e\n  \u003cli\u003eFreshwater and marine aquariums\u003c\/li\u003e\n  \u003cli\u003eSeries-connectable with Airstone Vario S and L units\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExpert Recommendations\u003c\/h3\u003e\n\u003cp\u003eFor optimal oxygenation, position the Vario M along the rear wall of the aquarium, partially buried in substrate. Use with an adjustable flow valve to fine-tune bubble density. In planted tanks, connect to a timer to activate only during the night period.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"AS Aquaristik","offers":[{"title":"Default Title","offer_id":61633293746506,"sku":"74p03278","price":3.83,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/14_e34b9977-b8ca-4017-a4a3-fc3c93e12c35.jpg?v=1780177440","url":"https:\/\/aquarium-boutique.com\/bg\/products\/as-aquaristik-airstone-vario-m-250mm","provider":"Aquarium Boutique","version":"1.0","type":"link"}