{"product_id":"top-fin-ef-s-element-filter-cartridges-6-month-supply-2-1-x-3-7-in","title":"Top Fin EF-S Element Filter Cartridges – 6-Month Supply (2.1 x 3.7 in)","description":"\u003ch2\u003eKeep Aquarium Water Clear with Top Fin EF-S Cartridges\u003c\/h2\u003e\n\u003cp\u003eDesigned as a refill for EF-S element filters and compatible Top Fin systems, this 6-month supply delivers activated carbon cartridges to help maintain water balance in your freshwater tank. The pack is suitable for BFS BettaFlo filters and desktop aquariums that use EF-S filtration.\u003c\/p\u003e\n\u003cp\u003eEach cartridge features an activated carbon core engineered to support filtration by reducing odors, pigments, and organic waste. While results can vary with stocking levels and tank setup, many hobbyists notice crisper water and less buildup after routine maintenance.\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box and how it helps\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSix activated-carbon cartridges for long-lasting filtration\u003c\/li\u003e\n  \u003cli\u003eCompatible with Top Fin BFS BettaFlo Filters and EF-S desktop tanks\u003c\/li\u003e\n  \u003cli\u003eCompact 2.1 in L x 3.7 in W cartridges for easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePossible benefits you may experience\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCleaner water appearance as carbon helps remove impurities\u003c\/li\u003e\n  \u003cli\u003eOdor reduction and more balanced tank conditions during regular upkeep\u003c\/li\u003e\n  \u003cli\u003eSimple replacement to maintain your chosen filtration routine\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUsage tips: Replace cartridges as part of routine filter maintenance or when you notice a change in water clarity. Rinse new cartridges under clean water before installing to remove any loose debris.\u003c\/p\u003e\n\u003ch3\u003eSpecs and compatibility\u003c\/h3\u003e\n\u003cp\u003eSix-pack, EF-S element filter compatible, color white\/black, dimensions 2.1 in L x 3.7 in W.\u003c\/p\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: What is included in the 6-month Top Fin EF-S cartridge supply?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Six activated-carbon cartridges designed for EF-S element filters and compatible Top Fin tanks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How can these cartridges help my aquarium water?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Activated carbon targets odors, pigments, and organic waste to support clearer, more balanced water.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Top Fin","offers":[{"title":"Default Title","offer_id":40565709242497,"sku":"B08HST1Q5P","price":59.04,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0598\/4757\/3633\/files\/top-fin-ef-s-element-filter-cartridge-pack-front-view.jpg?v=1766010355","url":"https:\/\/petiva.ca\/products\/top-fin-ef-s-element-filter-cartridges-6-month-supply-2-1-x-3-7-in","provider":"Petiva","version":"1.0","type":"link"}