{"product_id":"freesea-aquarium-heater-100w-500w-for-40-75-gallon-tanks-submersible-overheat-off-water-protection","title":"FREESEA Aquarium Heater 100W-500W for 40-75 Gallon Tanks | Submersible, Overheat \u0026 Off-Water Protection","description":"\u003ch2\u003eReliable heating for your aquarium—without guesswork\u003c\/h2\u003e\n\u003cp\u003eThe FREESEA Aquarium Heater is designed for 40 to 75-gallon tanks, supporting both saltwater and freshwater environments. With multiple wattage options (100W, 200W, 300W, 500W), you can select the right fit for your setup and keep water comfortably stable. The 110-120V design pairs with an extra-long 8.2-foot power cord for flexible placement and cleaner cord management. Note: Please refer to our size chart to choose the correct wattage for your aquarium.\u003c\/p\u003e\n\u003ch2\u003eSafety-first engineering you can rely on\u003c\/h2\u003e\n\u003cp\u003eOverheating protection automatically shuts the heater off when the water temperature climbs beyond the preset level. If the heater is exposed to air, it halts heating and displays an error, helping you prevent temperature spikes. Error codes E1 and E2 indicate out-of-water or mechanical issues, guiding quick checks.\u003c\/p\u003e\n\u003ch2\u003ePrecise control at your fingertips\u003c\/h2\u003e\n\u003cp\u003eThe external digital LED controller covers a 64℉–95℉ range with ±1℉ accuracy. You can adjust temperatures without opening the tank. The LED readout shows current water temperature, the target setting, and an auto shut-off alert, so you always know where you stand.\u003c\/p\u003e\n\u003ch2\u003eBuilt to last with careful design\u003c\/h2\u003e\n\u003cp\u003eCrafted from explosion-proof quartz glass and heat-resistant nickel-chromium wiring, the heater heats water efficiently while resisting wear. The rugged PC housing adds heat resistance and protects both your livestock and you from burns, even in busy home environments.\u003c\/p\u003e\n\u003ch2\u003eWhat you’ll experience in daily use\u003c\/h2\u003e\n\u003cp\u003eImagine a stable tank environment where your fish or corals respond calmly to gradual temperature changes. The long cord enables discreet placement behind furniture or inside a cabinet. The submersible unit blends with the tank while delivering steady warmth as needed.\u003c\/p\u003e\n\u003ch2\u003eWhy choose FREESEA\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVersatile wattage options for sizes from mid-sized to large aquariums\u003c\/li\u003e\n  \u003cli\u003eClear protection features that reduce risk of temperature drama\u003c\/li\u003e\n  \u003cli\u003eEasy, external temperature control for safe adjustments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n  \u003cli\u003eDurable, explosion-proof glass and heat-resistant housing for long-term reliability\u003c\/li\u003e\n  \u003cli\u003eFriendly after-sales support and 24-hour service\u003c\/li\u003e\n\u003c\/ul\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 the FREESEA Aquarium Heater suitable for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for 40-75 gallon tanks, suitable for both saltwater and freshwater setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How does the safety system protect the tank?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It features overheating and off-water protection with clear error codes and automatic shut-off when needed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FREESEA","offers":[{"title":"Default Title","offer_id":53549811728713,"sku":"B0DK1T4F5Q","price":48.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/1781\/9465\/files\/freesea-aquarium-heater-300w-submersible-digital-led_jpg.jpg?v=1766225656","url":"https:\/\/petvita.co.uk\/products\/freesea-aquarium-heater-100w-500w-for-40-75-gallon-tanks-submersible-overheat-off-water-protection","provider":"Petvita","version":"1.0","type":"link"}