{"product_id":"freesea-aquarium-heater-100w-500w-for-20-40-gallon-tanks-submersible-with-over-temperature-and-off-water-protection","title":"FREESEA Aquarium Heater 100W-500W for 20-40 Gallon Tanks | Submersible with Over-Temperature and Off-Water Protection","description":"\u003ch2\u003eEfficient, page-friendly heating for small and mid-size tanks\u003c\/h2\u003e\n\u003cp\u003eThe FREESEA Aquarium Heater is built to support both saltwater and freshwater setups in the 20–40 gallon range. It’s available in a range of wattages (100W, 200W, 300W, 500W) to match your tank’s needs. The compact 8.3-inch body is designed for reliable submersion, and the 110–120V operation pairs with a generous 6.6-foot power cord for flexible placement near the filter, rockwork, or side of the tank.\u003c\/p\u003e\n\n\u003ch3\u003eKey features that matter in daily use\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eWattage options (100W\/200W\/300W\/500W) tailored to tank size for balanced heating\u003c\/li\u003e\n  \u003cli\u003eExternal digital LED controller for easy adjustment without opening the aquarium lid\u003c\/li\u003e\n  \u003cli\u003ePrecise temperature control in a safe 64°F–95°F range with ±1°F accuracy\u003c\/li\u003e\n  \u003cli\u003eExplosion-proof quartz glass construction and heat-resistant PC housing for durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSmart safety and dependable protection\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOverheating protection automatically stops heating when the preset limit is reached\u003c\/li\u003e\n  \u003cli\u003eOff-water (air exposure) protection pauses heating if the heater isn’t fully submerged\u003c\/li\u003e\n  \u003cli\u003eClear error codes (E1 for out of water, E2 for mechanical fault) shown until safe conditions return\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReal-world use: what you can expect\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet and monitor water temperature via the external controller, without reaching into the tank\u003c\/li\u003e\n  \u003cli\u003eMaintain steady warmth for diverse aquatic life, whether you keep tropical fish or reef-friendly species\u003c\/li\u003e\n  \u003cli\u003eRely on rapid, uniform heat transfer thanks to high-temperature-resistant components\u003c\/li\u003e\n  \u003cli\u003eBenefit from a sturdy design that resists wear in busy home aquariums\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose FREESEA?\u003c\/h3\u003e\n\u003cp\u003eWith robust protection features and a user-friendly interface, this heater aims to support consistent conditions in your tank while offering dependable after-sales support. It’s designed to be a thoughtful addition to your aquarium setup, helping you adjust to evolving stocking plans and maintenance routines without overhauling equipment.\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 tank size is this heater best suited for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for 20–40 gallon tanks, with wattage options to fit your setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do safety protections work on this heater?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It auto-shuts off when overheating or exposed to air; codes E1\/E2 guide troubleshooting while submerged.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FREESEA","offers":[{"title":"Default Title","offer_id":57199986770297,"sku":"B0DK1QTX6F","price":31.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/8934\/1049\/files\/freesea-aquarium-heater-front-view.jpg?v=1777781563","url":"https:\/\/petlyvox.com\/products\/freesea-aquarium-heater-100w-500w-for-20-40-gallon-tanks-submersible-with-over-temperature-and-off-water-protection","provider":"petlyvox","version":"1.0","type":"link"}