{"product_id":"freesea-aquarium-heater-submersible-100w-200w-300w-500w-for-20-40-gallon-tanks-with-overheat-dry-run-protection","title":"FREESEA Aquarium Heater – Submersible 100W\/200W\/300W\/500W for 20-40 Gallon Tanks with Overheat \u0026 Dry-Run Protection","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMeet the FREESEA Aquarium Heater, a compact submersible solution designed for 20-40 gallon saltwater or freshwater tanks. Available in wattage options of 100W, 200W, 300W and 500W, it fits a variety of setups. The unit measures 8.3 inches in length, runs on 110-120V, and includes a 6.6-foot power cord for flexible placement in most aquariums.\u003c\/p\u003e\n\n\u003ch3\u003eKey features at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverheating and off-water protection\u003c\/strong\u003e: The heater automatically stops heating when water temperature reaches the preset limit or if the unit is exposed to air. An error code is shown until conditions return to safe levels. Codes include E1 for out of water and E2 for mechanical issues.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDigital LED controller\u003c\/strong\u003e: Adjust and monitor temperature from outside the tank. The display shows the current water temperature, the target setting, and an auto shut-off warning. Temperature range is 64°F to 95°F with an accuracy of ±1°F.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExplosion-proof quartz glass construction\u003c\/strong\u003e: The heater uses explosion-proof quartz glass and a nickel-chromium heating wire with quartz sand for efficient heat transfer, delivering quick warming and long-lasting performance. The durable PC housing resists heat and helps protect both fish and handlers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDurable design and everyday practicality\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged and safe\u003c\/strong\u003e: The combination of quartz glass and sturdy housing provides reliable operation in both freshwater and saltwater environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy external control\u003c\/strong\u003e: The external digital controller allows temperature adjustments without opening the tank, reducing disturbance to aquatic life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible installation\u003c\/strong\u003e: A long 6.6-foot power cord supports versatile placement in a variety of tank setups, enabling easy integration with filters and décor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWe stand behind the FREESEA heater with dedicated after-sales support. If you have questions about your heater, our team provides 24-hour professional assistance to help you troubleshoot and optimize your setup.\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 designed for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for 20-40 gallon tanks; select wattage using the size chart for your setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What safety features does the FREESEA heater include?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Overheat and off-water protection with clear error codes to guide troubleshooting.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FREESEA","offers":[{"title":"Default Title","offer_id":53555882295625,"sku":"B0DK1QTX6F","price":34.25,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/1781\/9465\/files\/freessea-aquarium-heater-submersible-100w.jpg?v=1766369110","url":"https:\/\/petvita.co.uk\/products\/freesea-aquarium-heater-submersible-100w-200w-300w-500w-for-20-40-gallon-tanks-with-overheat-dry-run-protection","provider":"Petvita","version":"1.0","type":"link"}