{"product_id":"100w-submersible-fish-tank-heater-for-10-20-gallon-b0dm6dnwkj","title":"100W Submersible Fish Tank Heater for 10-20 Gallon with Auto Shut-Off","description":"\u003cp\u003eOur team selected 100W Submersible Fish Tank Heater for 10-20 Gallon with Auto Shut-Off for fish owners who want a proven, well-reviewed option in aquarium temperature controllers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHeater Out of Water? Shuts Off and Alarms You Instantly: Water changes, evaporation, or a curious turtle can push your submersible heater above the waterline — and most heaters just keep burning until the glass cracks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-in-1 Safety:\u003c\/strong\u003e Dry-Burn + Overheat Protection + Max Temp Limit: Your fish get three independent layers of protection: (1) Dry-burn prevention — auto shutoff out of water, auto restart when re-submerged, (2) Overheat protection — stops at +1°F above set temperature, (3) Max…\u003c\/li\u003e\n\u003cli\u003eRed = Heating, Green = Ready — ±1°F Smart Control: The external LED thermostat displays real-time water temp and your adjustable target simultaneously. Digits glow red while heating, turn green when set temperature is reached.\u003c\/li\u003e\n\u003cli\u003eWave-Pattern Guard — Sleek Protection That Disappears in Your Tank: The elegant wave-shaped ABS guard wraps around the explosion-proof 2mm quartz glass element, shielding fish and turtles from hot surfaces.\u003c\/li\u003e\n\u003cli\u003ePick Your Wattage — Works from 5 Gallon to 120 Gallon: 100W = 10-20 gal, 200W = 20-40 gal, 300W = 40-70 gal, 500W = 70-120 gal. This submersible aquarium heater also works for mini setups and 5 gallon betta bowls.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePick your preferred size above to see photos and pricing for each option. Big Frenchies carries a curated selection of pet supplies so you can shop everything your fish needs in one place.\u003c\/p\u003e","brand":"DS-AMZ","offers":[{"title":"100W","offer_id":50600321581296,"sku":"AMZ-B0DM6DNWKJ","price":67.48,"currency_code":"USD","in_stock":true},{"title":"300W","offer_id":50600321614064,"sku":"AMZ-B0DM7Q6VSJ","price":67.48,"currency_code":"USD","in_stock":true},{"title":"500W","offer_id":50600321646832,"sku":"AMZ-B0DM6C8VJ9","price":69.98,"currency_code":"USD","in_stock":true},{"title":"200W","offer_id":50600321679600,"sku":"AMZ-B0DM7LTGZ4","price":67.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0434\/7985\/9361\/files\/71S5ayi3bWL._AC_SL1500.jpg?v=1791722997","url":"https:\/\/www.bigfrenchies.com\/products\/100w-submersible-fish-tank-heater-for-10-20-gallon-b0dm6dnwkj","provider":"BIG FRENCHIES","version":"1.0","type":"link"}