{"product_id":"penn-plax-undergravel-filter-for-20-29-gallon-tanks-clear-water-aeration","title":"Penn-Plax Undergravel Filter for 20–29 Gallon Tanks | Clear Water \u0026 Aeration","description":"\u003cdiv\u003e\n  \u003ch2\u003eOverview\u003c\/h2\u003e\n  \u003cp\u003ePENN-PLAX Clear-Free Premium Under Gravel Filter is an air-driven filtration system designed to keep water crystal-clear while preserving a neat aquarium interior. The design emphasizes simplicity with fewer moving parts, making routine maintenance straightforward for most 20 long to 29 gallon tanks.\u003c\/p\u003e\n  \u003cp\u003eWhether you keep freshwater or saltwater setups, this under gravel filter works with your substrate to support a balanced environment. When air is pumped through the included air stones and lifts through the tubes, water travels through the gravel and filter plates, then through the Filt-a-Carb carbon cartridges.\u003c\/p\u003e\n\n  \u003ch2\u003eHow it works\u003c\/h2\u003e\n  \u003cp\u003eAs air and water move through this system, beneficial bacteria can colonize in the gravel and plates, contributing to biological filtration. The carbon cartridges add a layer of chemical filtration, helping to reduce odors and impurities as water circulates.\u003c\/p\u003e\n\n  \u003ch2\u003eKey benefits and features\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLow maintenance design with two filter plates and air-driven operation\u003c\/li\u003e\n    \u003cli\u003eBiological, chemical, and physical filtration through gravel, plates, and carbon media\u003c\/li\u003e\n    \u003cli\u003eBuilt-in aeration: the filter also acts as a bubbler for added oxygen exchange\u003c\/li\u003e\n    \u003cli\u003eAll essential parts included: plates, lift tubes, airline tubes, connectors, and carbon cartridges\u003c\/li\u003e\n    \u003cli\u003eDimensions: each plate 14 in wide by 11.1 in deep; total span 28 in wide; lift tubes extend 13 to 16 in\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePractical setup and use\u003c\/h2\u003e\n  \u003cp\u003ePlace the filter under the gravel, connect to an appropriate air pump, and you will have a discreet, efficient filtration system. The dual action helps maintain clear water while preserving the natural look of your tank interior. Color variants of the plates may differ from the photos.\u003c\/p\u003e\n\n  \u003ch2\u003eNotes\u003c\/h2\u003e\n  \u003cp\u003eColors of the under gravel plates may vary from the product images. This unit is designed for 20 long to 29 gallon tanks and is suitable for freshwater and saltwater environments.\u003c\/p\u003e\n\u003c\/div\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 tank sizes is the Penn-Plax Undergravel Filter compatible with?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Suitable for most 20 (long) to 29 gallon tanks, freshwater or saltwater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this filter aerate the water?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It uses air stones and an air pump (not included) to filter and aerate at the same time.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Penn-Plax","offers":[{"title":"Default Title","offer_id":57200886710649,"sku":"B005Q4900Q","price":29.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/8934\/1049\/files\/penn-plax-undergravel-filter-plates.jpg?v=1777790205","url":"https:\/\/petlyvox.com\/products\/penn-plax-undergravel-filter-for-20-29-gallon-tanks-clear-water-aeration","provider":"petlyvox","version":"1.0","type":"link"}