{"product_id":"cunina-12-pack-large-filter-cartridges-compatible-with-tetra-whisper-20i-40i-iq-pf-models","title":"Cunina 12-Pack Large Filter Cartridges — Compatible with Tetra Whisper 20i\/40i, IQ \u0026 PF Models","description":"\u003csection\u003e\n  \u003ch2\u003eOverview\u003c\/h2\u003e\n  \u003cp\u003eThe Cunina 12-Pack Large Filter Cartridges deliver an easy, reliable filtration upgrade for larger Tetra Whisper bio-bag aquarium filters. Each cartridge is sized at about 6.7 inches long by 4.5 inches wide, and comes individually sealed to preserve quality from shelf to tank. Designed with real-world fish-keeping in mind, these cartridges aim to support clearer water, more consistent flow, and a calmer tank environment without sacrificing simplicity.\u003c\/p\u003e\n  \u003ch3\u003eFit and Compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePerfect fit with Tetra Whisper large 20i and 40i units, and IQ models 20, 30, 45, 60.\u003c\/li\u003e\n    \u003cli\u003eAlso compatible with PF20, PF30, PF40, and PF60 variants, providing broad model coverage for family tanks.\u003c\/li\u003e\n    \u003cli\u003eEach cartridge is part of a 12-pack, offering a practical supply for ongoing filtration needs.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eFiltration Performance\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDual-sided mesh captures debris and fish waste, helping reduce buildup, odors, and discoloration in the water.\u003c\/li\u003e\n    \u003cli\u003eActivated carbon media targets dissolved impurities, contributing to clearer water and a more balanced appearance in the tank.\u003c\/li\u003e\n    \u003cli\u003eNon-woven fabric layers trap finer particles, supporting a stable environment for fish and plants.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eMaterials and Readiness\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCartridges arrive fully assembled and ready to use—no extra assembly required before installation.\u003c\/li\u003e\n    \u003cli\u003eDurable construction and a dual-media design help maintain filtration capacity over time.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eUsage and Maintenance\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eRecommended replacement cadence is monthly to help maintain water quality, with results varying by stocking levels.\u003c\/li\u003e\n    \u003cli\u003ePrep the new cartridge by soaking in tank water for about 5 minutes and rinsing for 30 seconds before installation.\u003c\/li\u003e\n    \u003cli\u003eFor installation, power down the filter, remove the used cartridge, flush the new cartridge under cool water, and insert until fully seated.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eWhat You Get\u003c\/h3\u003e\n  \u003cp\u003e12 large filter cartridges—designed to protect your power filter and support a healthy looking tank, with packaging that preserves freshness until use.\u003c\/p\u003e\n  \u003cp\u003eNote: Brand names and\/or trademarks are used only for product description and identification of devices. Always verify compatibility with your specific model before purchasing.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Cunina 12-pack compatible with all Tetra Whisper large filters?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The pack fits Whisper large 20i\/40i units, IQ models 20–60, and PF20–PF60 variants as listed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How should I prepare and replace Cunina cartridges?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Soak 5 minutes, rinse 30 seconds, turn off the filter, remove the old cartridge, flush the new one under cool water, and insert fully.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Cunina","offers":[{"title":"Default Title","offer_id":53555586400585,"sku":"B0CZ9BTBQJ","price":37.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/1781\/9465\/files\/cunina-12pack-large-filter-cartridges-compat-tetra-whisper.jpg?v=1766357163","url":"https:\/\/petvita.co.uk\/products\/cunina-12-pack-large-filter-cartridges-compatible-with-tetra-whisper-20i-40i-iq-pf-models","provider":"Petvita","version":"1.0","type":"link"}